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Finding the Fourth Proportional to 29,199.98, 40,247.58 and 20,691.20

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Solution

The fourth proportional to 29,199.98, 40,247.58 and 20,691.20 is: 28,519.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,199.98 : 40,247.58 = 20,691.20 : x
  2. Step 2: Convert to fraction form
    29,199.98/40,247.58 = 20,691.20/x
  3. Step 3: Cross multiply
    29,199.98x = 40,247.58 × 20,691.20
  4. Step 4: Simplify right side
    29,199.98x = 832,770,727.30
  5. Step 5: Solve for x
    x = 832,770,727.30/29,199.98
  6. Step 6: Final answer
    x = 28,519.56

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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.