Home / 18,613.40-25,686.24-10,115.79

Finding the Fourth Proportional to 18,613.40, 25,686.24 and 10,115.79

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Solution

The fourth proportional to 18,613.40, 25,686.24 and 10,115.79 is: 13,959.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,613.40 : 25,686.24 = 10,115.79 : x
  2. Step 2: Convert to fraction form
    18,613.40/25,686.24 = 10,115.79/x
  3. Step 3: Cross multiply
    18,613.40x = 25,686.24 × 10,115.79
  4. Step 4: Simplify right side
    18,613.40x = 259,836,609.73
  5. Step 5: Solve for x
    x = 259,836,609.73/18,613.40
  6. Step 6: Final answer
    x = 13,959.65

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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.