Home / 20,811.60-31,217.56-8,332.70

Finding the Fourth Proportional to 20,811.60, 31,217.56 and 8,332.70

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Solution

The fourth proportional to 20,811.60, 31,217.56 and 8,332.70 is: 12,499.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,811.60 : 31,217.56 = 8,332.70 : x
  2. Step 2: Convert to fraction form
    20,811.60/31,217.56 = 8,332.70/x
  3. Step 3: Cross multiply
    20,811.60x = 31,217.56 × 8,332.70
  4. Step 4: Simplify right side
    20,811.60x = 260,126,562.21
  5. Step 5: Solve for x
    x = 260,126,562.21/20,811.60
  6. Step 6: Final answer
    x = 12,499.11

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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.