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Finding the Fourth Proportional to 29,419.92, 40,599.76 and 15,991.21

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Solution

The fourth proportional to 29,419.92, 40,599.76 and 15,991.21 is: 22,068.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,419.92 : 40,599.76 = 15,991.21 : x
  2. Step 2: Convert to fraction form
    29,419.92/40,599.76 = 15,991.21/x
  3. Step 3: Cross multiply
    29,419.92x = 40,599.76 × 15,991.21
  4. Step 4: Simplify right side
    29,419.92x = 649,239,288.11
  5. Step 5: Solve for x
    x = 649,239,288.11/29,419.92
  6. Step 6: Final answer
    x = 22,068.02

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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.