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Finding the Fourth Proportional to 15,175.20, 20,945.13 and 9,860.79

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Solution

The fourth proportional to 15,175.20, 20,945.13 and 9,860.79 is: 13,610.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,175.20 : 20,945.13 = 9,860.79 : x
  2. Step 2: Convert to fraction form
    15,175.20/20,945.13 = 9,860.79/x
  3. Step 3: Cross multiply
    15,175.20x = 20,945.13 × 9,860.79
  4. Step 4: Simplify right side
    15,175.20x = 206,535,423.73
  5. Step 5: Solve for x
    x = 206,535,423.73/15,175.20
  6. Step 6: Final answer
    x = 13,610.07

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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.