Home / 20,637.92-28,480.38-12,680.04

Finding the Fourth Proportional to 20,637.92, 28,480.38 and 12,680.04

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Solution

The fourth proportional to 20,637.92, 28,480.38 and 12,680.04 is: 17,498.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,637.92 : 28,480.38 = 12,680.04 : x
  2. Step 2: Convert to fraction form
    20,637.92/28,480.38 = 12,680.04/x
  3. Step 3: Cross multiply
    20,637.92x = 28,480.38 × 12,680.04
  4. Step 4: Simplify right side
    20,637.92x = 361,132,357.62
  5. Step 5: Solve for x
    x = 361,132,357.62/20,637.92
  6. Step 6: Final answer
    x = 17,498.49

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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.