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Finding the Fourth Proportional to 12,491.76, 17,238.76 and 6,902.76

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Solution

The fourth proportional to 12,491.76, 17,238.76 and 6,902.76 is: 9,525.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,491.76 : 17,238.76 = 6,902.76 : x
  2. Step 2: Convert to fraction form
    12,491.76/17,238.76 = 6,902.76/x
  3. Step 3: Cross multiply
    12,491.76x = 17,238.76 × 6,902.76
  4. Step 4: Simplify right side
    12,491.76x = 118,995,022.98
  5. Step 5: Solve for x
    x = 118,995,022.98/12,491.76
  6. Step 6: Final answer
    x = 9,525.88

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Find fourth proportional to 6,245.88, 8,619.38 and 3,451.38
Half scale
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Double scale
Find fourth proportional to 12,492.76, 17,240.14 and 6,903.76
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.