Home / 28,073.52-42,120-18,750.96

Finding the Fourth Proportional to 28,073.52, 42,120 and 18,750.96

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Solution

The fourth proportional to 28,073.52, 42,120 and 18,750.96 is: 28,132.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,073.52 : 42,120 = 18,750.96 : x
  2. Step 2: Convert to fraction form
    28,073.52/42,120 = 18,750.96/x
  3. Step 3: Cross multiply
    28,073.52x = 42,120 × 18,750.96
  4. Step 4: Simplify right side
    28,073.52x = 789,790,435.20
  5. Step 5: Solve for x
    x = 789,790,435.20/28,073.52
  6. Step 6: Final answer
    x = 28,132.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.