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Finding the Fourth Proportional to 29,418.74, 40,598.11 and 15,990

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Solution

The fourth proportional to 29,418.74, 40,598.11 and 15,990 is: 22,066.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,418.74 : 40,598.11 = 15,990 : x
  2. Step 2: Convert to fraction form
    29,418.74/40,598.11 = 15,990/x
  3. Step 3: Cross multiply
    29,418.74x = 40,598.11 × 15,990
  4. Step 4: Simplify right side
    29,418.74x = 649,163,778.90
  5. Step 5: Solve for x
    x = 649,163,778.90/29,418.74
  6. Step 6: Final answer
    x = 22,066.34

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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.