Home / 11,515.17-15,885.57-7,481.73

Finding the Fourth Proportional to 11,515.17, 15,885.57 and 7,481.73

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Solution

The fourth proportional to 11,515.17, 15,885.57 and 7,481.73 is: 10,321.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,515.17 : 15,885.57 = 7,481.73 : x
  2. Step 2: Convert to fraction form
    11,515.17/15,885.57 = 7,481.73/x
  3. Step 3: Cross multiply
    11,515.17x = 15,885.57 × 7,481.73
  4. Step 4: Simplify right side
    11,515.17x = 118,851,545.64
  5. Step 5: Solve for x
    x = 118,851,545.64/11,515.17
  6. Step 6: Final answer
    x = 10,321.30

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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.