Home / 20,565.38-28,380.23-11,133.95

Finding the Fourth Proportional to 20,565.38, 28,380.23 and 11,133.95

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Solution

The fourth proportional to 20,565.38, 28,380.23 and 11,133.95 is: 15,364.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,565.38 : 28,380.23 = 11,133.95 : x
  2. Step 2: Convert to fraction form
    20,565.38/28,380.23 = 11,133.95/x
  3. Step 3: Cross multiply
    20,565.38x = 28,380.23 × 11,133.95
  4. Step 4: Simplify right side
    20,565.38x = 315,983,864.24
  5. Step 5: Solve for x
    x = 315,983,864.24/20,565.38
  6. Step 6: Final answer
    x = 15,364.85

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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.