Home / 20,334.87-28,060.80-11,380.86

Finding the Fourth Proportional to 20,334.87, 28,060.80 and 11,380.86

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Solution

The fourth proportional to 20,334.87, 28,060.80 and 11,380.86 is: 15,704.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,334.87 : 28,060.80 = 11,380.86 : x
  2. Step 2: Convert to fraction form
    20,334.87/28,060.80 = 11,380.86/x
  3. Step 3: Cross multiply
    20,334.87x = 28,060.80 × 11,380.86
  4. Step 4: Simplify right side
    20,334.87x = 319,356,036.29
  5. Step 5: Solve for x
    x = 319,356,036.29/20,334.87
  6. Step 6: Final answer
    x = 15,704.85

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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.