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Finding the Fourth Proportional to 29,082.20, 40,128.60 and 17,143.88

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Solution

The fourth proportional to 29,082.20, 40,128.60 and 17,143.88 is: 23,655.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,082.20 : 40,128.60 = 17,143.88 : x
  2. Step 2: Convert to fraction form
    29,082.20/40,128.60 = 17,143.88/x
  3. Step 3: Cross multiply
    29,082.20x = 40,128.60 × 17,143.88
  4. Step 4: Simplify right side
    29,082.20x = 687,959,902.97
  5. Step 5: Solve for x
    x = 687,959,902.97/29,082.20
  6. Step 6: Final answer
    x = 23,655.70

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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.