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Finding the Fourth Proportional to 15,077.47, 20,805.42 and 8,617.18

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Solution

The fourth proportional to 15,077.47, 20,805.42 and 8,617.18 is: 11,890.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,077.47 : 20,805.42 = 8,617.18 : x
  2. Step 2: Convert to fraction form
    15,077.47/20,805.42 = 8,617.18/x
  3. Step 3: Cross multiply
    15,077.47x = 20,805.42 × 8,617.18
  4. Step 4: Simplify right side
    15,077.47x = 179,284,049.12
  5. Step 5: Solve for x
    x = 179,284,049.12/15,077.47
  6. Step 6: Final answer
    x = 11,890.86

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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.