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Finding the Fourth Proportional to 15,020.88, 20,728.44 and 8,306.88

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Solution

The fourth proportional to 15,020.88, 20,728.44 and 8,306.88 is: 11,463.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,020.88 : 20,728.44 = 8,306.88 : x
  2. Step 2: Convert to fraction form
    15,020.88/20,728.44 = 8,306.88/x
  3. Step 3: Cross multiply
    15,020.88x = 20,728.44 × 8,306.88
  4. Step 4: Simplify right side
    15,020.88x = 172,188,663.67
  5. Step 5: Solve for x
    x = 172,188,663.67/15,020.88
  6. Step 6: Final answer
    x = 11,463.29

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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.