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Finding the Fourth Proportional to 8,406.76, 11,601.36 and 4,680.76

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Solution

The fourth proportional to 8,406.76, 11,601.36 and 4,680.76 is: 6,459.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,406.76 : 11,601.36 = 4,680.76 : x
  2. Step 2: Convert to fraction form
    8,406.76/11,601.36 = 4,680.76/x
  3. Step 3: Cross multiply
    8,406.76x = 11,601.36 × 4,680.76
  4. Step 4: Simplify right side
    8,406.76x = 54,303,181.83
  5. Step 5: Solve for x
    x = 54,303,181.83/8,406.76
  6. Step 6: Final answer
    x = 6,459.47

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Find fourth proportional to 4,203.38, 5,800.68 and 2,340.38
Half scale
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Double scale
Find fourth proportional to 8,407.76, 11,602.74 and 4,681.76
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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.