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Finding the Fourth Proportional to 15,057.28, 20,781 and 9,092.32

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Solution

The fourth proportional to 15,057.28, 20,781 and 9,092.32 is: 12,548.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,057.28 : 20,781 = 9,092.32 : x
  2. Step 2: Convert to fraction form
    15,057.28/20,781 = 9,092.32/x
  3. Step 3: Cross multiply
    15,057.28x = 20,781 × 9,092.32
  4. Step 4: Simplify right side
    15,057.28x = 188,947,501.92
  5. Step 5: Solve for x
    x = 188,947,501.92/15,057.28
  6. Step 6: Final answer
    x = 12,548.58

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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.