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Finding the Fourth Proportional to 29,139.60, 40,207.20 and 17,198.40

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Solution

The fourth proportional to 29,139.60, 40,207.20 and 17,198.40 is: 23,730.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,139.60 : 40,207.20 = 17,198.40 : x
  2. Step 2: Convert to fraction form
    29,139.60/40,207.20 = 17,198.40/x
  3. Step 3: Cross multiply
    29,139.60x = 40,207.20 × 17,198.40
  4. Step 4: Simplify right side
    29,139.60x = 691,499,508.48
  5. Step 5: Solve for x
    x = 691,499,508.48/29,139.60
  6. Step 6: Final answer
    x = 23,730.58

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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.