Home / 15,115.91-20,854.14-11,146.46

Finding the Fourth Proportional to 15,115.91, 20,854.14 and 11,146.46

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Solution

The fourth proportional to 15,115.91, 20,854.14 and 11,146.46 is: 15,377.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,115.91 : 20,854.14 = 11,146.46 : x
  2. Step 2: Convert to fraction form
    15,115.91/20,854.14 = 11,146.46/x
  3. Step 3: Cross multiply
    15,115.91x = 20,854.14 × 11,146.46
  4. Step 4: Simplify right side
    15,115.91x = 232,449,837.34
  5. Step 5: Solve for x
    x = 232,449,837.34/15,115.91
  6. Step 6: Final answer
    x = 15,377.83

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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.