Home / 12,939.32-17,854.80-8,689.52

Finding the Fourth Proportional to 12,939.32, 17,854.80 and 8,689.52

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Solution

The fourth proportional to 12,939.32, 17,854.80 and 8,689.52 is: 11,990.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.32 : 17,854.80 = 8,689.52 : x
  2. Step 2: Convert to fraction form
    12,939.32/17,854.80 = 8,689.52/x
  3. Step 3: Cross multiply
    12,939.32x = 17,854.80 × 8,689.52
  4. Step 4: Simplify right side
    12,939.32x = 155,149,641.70
  5. Step 5: Solve for x
    x = 155,149,641.70/12,939.32
  6. Step 6: Final answer
    x = 11,990.56

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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.