Home / 20,585.22-28,408.14-12,622.86

Finding the Fourth Proportional to 20,585.22, 28,408.14 and 12,622.86

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Solution

The fourth proportional to 20,585.22, 28,408.14 and 12,622.86 is: 17,419.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,585.22 : 28,408.14 = 12,622.86 : x
  2. Step 2: Convert to fraction form
    20,585.22/28,408.14 = 12,622.86/x
  3. Step 3: Cross multiply
    20,585.22x = 28,408.14 × 12,622.86
  4. Step 4: Simplify right side
    20,585.22x = 358,591,974.08
  5. Step 5: Solve for x
    x = 358,591,974.08/20,585.22
  6. Step 6: Final answer
    x = 17,419.88

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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.