Home / 20,581.22-28,402.62-12,618.86

Finding the Fourth Proportional to 20,581.22, 28,402.62 and 12,618.86

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Solution

The fourth proportional to 20,581.22, 28,402.62 and 12,618.86 is: 17,414.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,581.22 : 28,402.62 = 12,618.86 : x
  2. Step 2: Convert to fraction form
    20,581.22/28,402.62 = 12,618.86/x
  3. Step 3: Cross multiply
    20,581.22x = 28,402.62 × 12,618.86
  4. Step 4: Simplify right side
    20,581.22x = 358,408,685.41
  5. Step 5: Solve for x
    x = 358,408,685.41/20,581.22
  6. Step 6: Final answer
    x = 17,414.36

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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.