Home / 15,718.30-21,691.25-8,645.18

Finding the Fourth Proportional to 15,718.30, 21,691.25 and 8,645.18

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Solution

The fourth proportional to 15,718.30, 21,691.25 and 8,645.18 is: 11,930.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,718.30 : 21,691.25 = 8,645.18 : x
  2. Step 2: Convert to fraction form
    15,718.30/21,691.25 = 8,645.18/x
  3. Step 3: Cross multiply
    15,718.30x = 21,691.25 × 8,645.18
  4. Step 4: Simplify right side
    15,718.30x = 187,524,760.68
  5. Step 5: Solve for x
    x = 187,524,760.68/15,718.30
  6. Step 6: Final answer
    x = 11,930.35

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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.