Home / 20,910.13-28,851.22-12,407.86

Finding the Fourth Proportional to 20,910.13, 28,851.22 and 12,407.86

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Solution

The fourth proportional to 20,910.13, 28,851.22 and 12,407.86 is: 17,120.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,910.13 : 28,851.22 = 12,407.86 : x
  2. Step 2: Convert to fraction form
    20,910.13/28,851.22 = 12,407.86/x
  3. Step 3: Cross multiply
    20,910.13x = 28,851.22 × 12,407.86
  4. Step 4: Simplify right side
    20,910.13x = 357,981,836.55
  5. Step 5: Solve for x
    x = 357,981,836.55/20,910.13
  6. Step 6: Final answer
    x = 17,120.02

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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.