Home / 20,878.26-31,275.66-12,553.71

Finding the Fourth Proportional to 20,878.26, 31,275.66 and 12,553.71

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Solution

The fourth proportional to 20,878.26, 31,275.66 and 12,553.71 is: 18,805.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,878.26 : 31,275.66 = 12,553.71 : x
  2. Step 2: Convert to fraction form
    20,878.26/31,275.66 = 12,553.71/x
  3. Step 3: Cross multiply
    20,878.26x = 31,275.66 × 12,553.71
  4. Step 4: Simplify right side
    20,878.26x = 392,625,565.70
  5. Step 5: Solve for x
    x = 392,625,565.70/20,878.26
  6. Step 6: Final answer
    x = 18,805.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.