Home / 20,578.52-28,399.21-12,517.61

Finding the Fourth Proportional to 20,578.52, 28,399.21 and 12,517.61

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Solution

The fourth proportional to 20,578.52, 28,399.21 and 12,517.61 is: 17,274.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,578.52 : 28,399.21 = 12,517.61 : x
  2. Step 2: Convert to fraction form
    20,578.52/28,399.21 = 12,517.61/x
  3. Step 3: Cross multiply
    20,578.52x = 28,399.21 × 12,517.61
  4. Step 4: Simplify right side
    20,578.52x = 355,490,061.80
  5. Step 5: Solve for x
    x = 355,490,061.80/20,578.52
  6. Step 6: Final answer
    x = 17,274.81

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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.