Home / 28,381.73-42,572.52-15,739.21

Finding the Fourth Proportional to 28,381.73, 42,572.52 and 15,739.21

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Solution

The fourth proportional to 28,381.73, 42,572.52 and 15,739.21 is: 23,608.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,381.73 : 42,572.52 = 15,739.21 : x
  2. Step 2: Convert to fraction form
    28,381.73/42,572.52 = 15,739.21/x
  3. Step 3: Cross multiply
    28,381.73x = 42,572.52 × 15,739.21
  4. Step 4: Simplify right side
    28,381.73x = 670,057,885.72
  5. Step 5: Solve for x
    x = 670,057,885.72/28,381.73
  6. Step 6: Final answer
    x = 23,608.78

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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.