Home / 15,747.50-21,731.56-8,673.90

Finding the Fourth Proportional to 15,747.50, 21,731.56 and 8,673.90

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Solution

The fourth proportional to 15,747.50, 21,731.56 and 8,673.90 is: 11,969.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,747.50 : 21,731.56 = 8,673.90 : x
  2. Step 2: Convert to fraction form
    15,747.50/21,731.56 = 8,673.90/x
  3. Step 3: Cross multiply
    15,747.50x = 21,731.56 × 8,673.90
  4. Step 4: Simplify right side
    15,747.50x = 188,497,378.28
  5. Step 5: Solve for x
    x = 188,497,378.28/15,747.50
  6. Step 6: Final answer
    x = 11,969.99

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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.