Home / 20,135.10-30,217.05-8,456.70

Finding the Fourth Proportional to 20,135.10, 30,217.05 and 8,456.70

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Solution

The fourth proportional to 20,135.10, 30,217.05 and 8,456.70 is: 12,691.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,135.10 : 30,217.05 = 8,456.70 : x
  2. Step 2: Convert to fraction form
    20,135.10/30,217.05 = 8,456.70/x
  3. Step 3: Cross multiply
    20,135.10x = 30,217.05 × 8,456.70
  4. Step 4: Simplify right side
    20,135.10x = 255,536,526.74
  5. Step 5: Solve for x
    x = 255,536,526.74/20,135.10
  6. Step 6: Final answer
    x = 12,691.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.