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Finding the Fourth Proportional to 15,168.72, 20,932.25 and 8,454.02

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Solution

The fourth proportional to 15,168.72, 20,932.25 and 8,454.02 is: 11,666.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,168.72 : 20,932.25 = 8,454.02 : x
  2. Step 2: Convert to fraction form
    15,168.72/20,932.25 = 8,454.02/x
  3. Step 3: Cross multiply
    15,168.72x = 20,932.25 × 8,454.02
  4. Step 4: Simplify right side
    15,168.72x = 176,961,733.61
  5. Step 5: Solve for x
    x = 176,961,733.61/15,168.72
  6. Step 6: Final answer
    x = 11,666.23

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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.