Home / 20,766.24-28,648.08-12,382.88

Finding the Fourth Proportional to 20,766.24, 28,648.08 and 12,382.88

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Solution

The fourth proportional to 20,766.24, 28,648.08 and 12,382.88 is: 17,082.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,766.24 : 28,648.08 = 12,382.88 : x
  2. Step 2: Convert to fraction form
    20,766.24/28,648.08 = 12,382.88/x
  3. Step 3: Cross multiply
    20,766.24x = 28,648.08 × 12,382.88
  4. Step 4: Simplify right side
    20,766.24x = 354,745,736.87
  5. Step 5: Solve for x
    x = 354,745,736.87/20,766.24
  6. Step 6: Final answer
    x = 17,082.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.