Home / 20,790.75-28,691.84-11,359.92

Finding the Fourth Proportional to 20,790.75, 28,691.84 and 11,359.92

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Solution

The fourth proportional to 20,790.75, 28,691.84 and 11,359.92 is: 15,677.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.75 : 28,691.84 = 11,359.92 : x
  2. Step 2: Convert to fraction form
    20,790.75/28,691.84 = 11,359.92/x
  3. Step 3: Cross multiply
    20,790.75x = 28,691.84 × 11,359.92
  4. Step 4: Simplify right side
    20,790.75x = 325,937,035.45
  5. Step 5: Solve for x
    x = 325,937,035.45/20,790.75
  6. Step 6: Final answer
    x = 15,677.02

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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.