Home / 20,565.17-28,380.07-11,133.73

Finding the Fourth Proportional to 20,565.17, 28,380.07 and 11,133.73

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Solution

The fourth proportional to 20,565.17, 28,380.07 and 11,133.73 is: 15,364.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,565.17 : 28,380.07 = 11,133.73 : x
  2. Step 2: Convert to fraction form
    20,565.17/28,380.07 = 11,133.73/x
  3. Step 3: Cross multiply
    20,565.17x = 28,380.07 × 11,133.73
  4. Step 4: Simplify right side
    20,565.17x = 315,976,036.76
  5. Step 5: Solve for x
    x = 315,976,036.76/20,565.17
  6. Step 6: Final answer
    x = 15,364.62

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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.