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Finding the Fourth Proportional to 29,139.78, 40,211.89 and 16,393.21

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Solution

The fourth proportional to 29,139.78, 40,211.89 and 16,393.21 is: 22,622.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,139.78 : 40,211.89 = 16,393.21 : x
  2. Step 2: Convert to fraction form
    29,139.78/40,211.89 = 16,393.21/x
  3. Step 3: Cross multiply
    29,139.78x = 40,211.89 × 16,393.21
  4. Step 4: Simplify right side
    29,139.78x = 659,201,957.27
  5. Step 5: Solve for x
    x = 659,201,957.27/29,139.78
  6. Step 6: Final answer
    x = 22,622.06

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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.