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Finding the Fourth Proportional to 15,079.57, 20,805.53 and 8,790.73

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Solution

The fourth proportional to 15,079.57, 20,805.53 and 8,790.73 is: 12,128.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,079.57 : 20,805.53 = 8,790.73 : x
  2. Step 2: Convert to fraction form
    15,079.57/20,805.53 = 8,790.73/x
  3. Step 3: Cross multiply
    15,079.57x = 20,805.53 × 8,790.73
  4. Step 4: Simplify right side
    15,079.57x = 182,895,752.78
  5. Step 5: Solve for x
    x = 182,895,752.78/15,079.57
  6. Step 6: Final answer
    x = 12,128.71

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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.