Home / 20,665.20-28,517.64-11,233.92

Finding the Fourth Proportional to 20,665.20, 28,517.64 and 11,233.92

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Solution

The fourth proportional to 20,665.20, 28,517.64 and 11,233.92 is: 15,502.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,665.20 : 28,517.64 = 11,233.92 : x
  2. Step 2: Convert to fraction form
    20,665.20/28,517.64 = 11,233.92/x
  3. Step 3: Cross multiply
    20,665.20x = 28,517.64 × 11,233.92
  4. Step 4: Simplify right side
    20,665.20x = 320,364,886.35
  5. Step 5: Solve for x
    x = 320,364,886.35/20,665.20
  6. Step 6: Final answer
    x = 15,502.63

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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.