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Finding the Fourth Proportional to 15,589.60, 21,520.73 and 9,932.11

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Solution

The fourth proportional to 15,589.60, 21,520.73 and 9,932.11 is: 13,710.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,589.60 : 21,520.73 = 9,932.11 : x
  2. Step 2: Convert to fraction form
    15,589.60/21,520.73 = 9,932.11/x
  3. Step 3: Cross multiply
    15,589.60x = 21,520.73 × 9,932.11
  4. Step 4: Simplify right side
    15,589.60x = 213,746,100.38
  5. Step 5: Solve for x
    x = 213,746,100.38/15,589.60
  6. Step 6: Final answer
    x = 13,710.81

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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.