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Finding the Fourth Proportional to 29,068.28, 40,121.90 and 17,139.56

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Solution

The fourth proportional to 29,068.28, 40,121.90 and 17,139.56 is: 23,657.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,068.28 : 40,121.90 = 17,139.56 : x
  2. Step 2: Convert to fraction form
    29,068.28/40,121.90 = 17,139.56/x
  3. Step 3: Cross multiply
    29,068.28x = 40,121.90 × 17,139.56
  4. Step 4: Simplify right side
    29,068.28x = 687,671,712.36
  5. Step 5: Solve for x
    x = 687,671,712.36/29,068.28
  6. Step 6: Final answer
    x = 23,657.12

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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.