Home / 28,321.98-39,083.67-15,747.90

Finding the Fourth Proportional to 28,321.98, 39,083.67 and 15,747.90

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Solution

The fourth proportional to 28,321.98, 39,083.67 and 15,747.90 is: 21,731.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,321.98 : 39,083.67 = 15,747.90 : x
  2. Step 2: Convert to fraction form
    28,321.98/39,083.67 = 15,747.90/x
  3. Step 3: Cross multiply
    28,321.98x = 39,083.67 × 15,747.90
  4. Step 4: Simplify right side
    28,321.98x = 615,485,726.79
  5. Step 5: Solve for x
    x = 615,485,726.79/28,321.98
  6. Step 6: Final answer
    x = 21,731.73

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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.