Home / 20,753.29-28,639.47-11,321.79

Finding the Fourth Proportional to 20,753.29, 28,639.47 and 11,321.79

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Solution

The fourth proportional to 20,753.29, 28,639.47 and 11,321.79 is: 15,624.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,753.29 : 28,639.47 = 11,321.79 : x
  2. Step 2: Convert to fraction form
    20,753.29/28,639.47 = 11,321.79/x
  3. Step 3: Cross multiply
    20,753.29x = 28,639.47 × 11,321.79
  4. Step 4: Simplify right side
    20,753.29x = 324,250,065.05
  5. Step 5: Solve for x
    x = 324,250,065.05/20,753.29
  6. Step 6: Final answer
    x = 15,624.03

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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.