Home / 15,753.23-21,739.81-8,679.66

Finding the Fourth Proportional to 15,753.23, 21,739.81 and 8,679.66

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Solution

The fourth proportional to 15,753.23, 21,739.81 and 8,679.66 is: 11,978.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,753.23 : 21,739.81 = 8,679.66 : x
  2. Step 2: Convert to fraction form
    15,753.23/21,739.81 = 8,679.66/x
  3. Step 3: Cross multiply
    15,753.23x = 21,739.81 × 8,679.66
  4. Step 4: Simplify right side
    15,753.23x = 188,694,035.70
  5. Step 5: Solve for x
    x = 188,694,035.70/15,753.23
  6. Step 6: Final answer
    x = 11,978.11

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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.