Home / 20,753.35-28,639.95-11,321.92

Finding the Fourth Proportional to 20,753.35, 28,639.95 and 11,321.92

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Solution

The fourth proportional to 20,753.35, 28,639.95 and 11,321.92 is: 15,624.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,753.35 : 28,639.95 = 11,321.92 : x
  2. Step 2: Convert to fraction form
    20,753.35/28,639.95 = 11,321.92/x
  3. Step 3: Cross multiply
    20,753.35x = 28,639.95 × 11,321.92
  4. Step 4: Simplify right side
    20,753.35x = 324,259,054.95
  5. Step 5: Solve for x
    x = 324,259,054.95/20,753.35
  6. Step 6: Final answer
    x = 15,624.42

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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.