Home / 20,517.12-30,771.84-12,773.76

Finding the Fourth Proportional to 20,517.12, 30,771.84 and 12,773.76

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Solution

The fourth proportional to 20,517.12, 30,771.84 and 12,773.76 is: 19,158.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,517.12 : 30,771.84 = 12,773.76 : x
  2. Step 2: Convert to fraction form
    20,517.12/30,771.84 = 12,773.76/x
  3. Step 3: Cross multiply
    20,517.12x = 30,771.84 × 12,773.76
  4. Step 4: Simplify right side
    20,517.12x = 393,072,098.92
  5. Step 5: Solve for x
    x = 393,072,098.92/20,517.12
  6. Step 6: Final answer
    x = 19,158.25

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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.