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Finding the Fourth Proportional to 29,240, 40,351.36 and 15,992

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Solution

The fourth proportional to 29,240, 40,351.36 and 15,992 is: 22,069.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,240 : 40,351.36 = 15,992 : x
  2. Step 2: Convert to fraction form
    29,240/40,351.36 = 15,992/x
  3. Step 3: Cross multiply
    29,240x = 40,351.36 × 15,992
  4. Step 4: Simplify right side
    29,240x = 645,298,949.12
  5. Step 5: Solve for x
    x = 645,298,949.12/29,240
  6. Step 6: Final answer
    x = 22,069.05

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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.