Home / 11,129.84-15,342.82-8,472.62

Finding the Fourth Proportional to 11,129.84, 15,342.82 and 8,472.62

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Solution

The fourth proportional to 11,129.84, 15,342.82 and 8,472.62 is: 11,679.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,129.84 : 15,342.82 = 8,472.62 : x
  2. Step 2: Convert to fraction form
    11,129.84/15,342.82 = 8,472.62/x
  3. Step 3: Cross multiply
    11,129.84x = 15,342.82 × 8,472.62
  4. Step 4: Simplify right side
    11,129.84x = 129,993,883.59
  5. Step 5: Solve for x
    x = 129,993,883.59/11,129.84
  6. Step 6: Final answer
    x = 11,679.76

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Half scale
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Double scale
Find fourth proportional to 11,130.84, 15,344.20 and 8,473.62
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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.