Home / 20,148.60-30,219.12-8,461.92

Finding the Fourth Proportional to 20,148.60, 30,219.12 and 8,461.92

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Solution

The fourth proportional to 20,148.60, 30,219.12 and 8,461.92 is: 12,691.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,148.60 : 30,219.12 = 8,461.92 : x
  2. Step 2: Convert to fraction form
    20,148.60/30,219.12 = 8,461.92/x
  3. Step 3: Cross multiply
    20,148.60x = 30,219.12 × 8,461.92
  4. Step 4: Simplify right side
    20,148.60x = 255,711,775.91
  5. Step 5: Solve for x
    x = 255,711,775.91/20,148.60
  6. Step 6: Final answer
    x = 12,691.29

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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.