Home / 15,713.19-21,684.17-8,639.73

Finding the Fourth Proportional to 15,713.19, 21,684.17 and 8,639.73

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Solution

The fourth proportional to 15,713.19, 21,684.17 and 8,639.73 is: 11,922.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,713.19 : 21,684.17 = 8,639.73 : x
  2. Step 2: Convert to fraction form
    15,713.19/21,684.17 = 8,639.73/x
  3. Step 3: Cross multiply
    15,713.19x = 21,684.17 × 8,639.73
  4. Step 4: Simplify right side
    15,713.19x = 187,345,330.88
  5. Step 5: Solve for x
    x = 187,345,330.88/15,713.19
  6. Step 6: Final answer
    x = 11,922.81

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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.