Home / 8,381.87-12,572.61-4,220.76

Finding the Fourth Proportional to 8,381.87, 12,572.61 and 4,220.76

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Solution

The fourth proportional to 8,381.87, 12,572.61 and 4,220.76 is: 6,331.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,381.87 : 12,572.61 = 4,220.76 : x
  2. Step 2: Convert to fraction form
    8,381.87/12,572.61 = 4,220.76/x
  3. Step 3: Cross multiply
    8,381.87x = 12,572.61 × 4,220.76
  4. Step 4: Simplify right side
    8,381.87x = 53,065,969.38
  5. Step 5: Solve for x
    x = 53,065,969.38/8,381.87
  6. Step 6: Final answer
    x = 6,331.04

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Half scale
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Double scale
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Similar ratio
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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.