Home / 20,584.16-28,407.56-12,520.97

Finding the Fourth Proportional to 20,584.16, 28,407.56 and 12,520.97

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Solution

The fourth proportional to 20,584.16, 28,407.56 and 12,520.97 is: 17,279.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,584.16 : 28,407.56 = 12,520.97 : x
  2. Step 2: Convert to fraction form
    20,584.16/28,407.56 = 12,520.97/x
  3. Step 3: Cross multiply
    20,584.16x = 28,407.56 × 12,520.97
  4. Step 4: Simplify right side
    20,584.16x = 355,690,095.80
  5. Step 5: Solve for x
    x = 355,690,095.80/20,584.16
  6. Step 6: Final answer
    x = 17,279.79

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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.