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Finding the Fourth Proportional to 29,407.62, 40,581.90 and 15,978.36

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Solution

The fourth proportional to 29,407.62, 40,581.90 and 15,978.36 is: 22,049.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,407.62 : 40,581.90 = 15,978.36 : x
  2. Step 2: Convert to fraction form
    29,407.62/40,581.90 = 15,978.36/x
  3. Step 3: Cross multiply
    29,407.62x = 40,581.90 × 15,978.36
  4. Step 4: Simplify right side
    29,407.62x = 648,432,207.68
  5. Step 5: Solve for x
    x = 648,432,207.68/29,407.62
  6. Step 6: Final answer
    x = 22,049.80

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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.