Home / 20,750.12-28,635.18-11,318.68

Finding the Fourth Proportional to 20,750.12, 28,635.18 and 11,318.68

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Solution

The fourth proportional to 20,750.12, 28,635.18 and 11,318.68 is: 15,619.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,750.12 : 28,635.18 = 11,318.68 : x
  2. Step 2: Convert to fraction form
    20,750.12/28,635.18 = 11,318.68/x
  3. Step 3: Cross multiply
    20,750.12x = 28,635.18 × 11,318.68
  4. Step 4: Simplify right side
    20,750.12x = 324,112,439.16
  5. Step 5: Solve for x
    x = 324,112,439.16/20,750.12
  6. Step 6: Final answer
    x = 15,619.79

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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.