Home / 15,489.48-21,375.60-8,415.93

Finding the Fourth Proportional to 15,489.48, 21,375.60 and 8,415.93

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Solution

The fourth proportional to 15,489.48, 21,375.60 and 8,415.93 is: 11,614.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,489.48 : 21,375.60 = 8,415.93 : x
  2. Step 2: Convert to fraction form
    15,489.48/21,375.60 = 8,415.93/x
  3. Step 3: Cross multiply
    15,489.48x = 21,375.60 × 8,415.93
  4. Step 4: Simplify right side
    15,489.48x = 179,895,553.31
  5. Step 5: Solve for x
    x = 179,895,553.31/15,489.48
  6. Step 6: Final answer
    x = 11,614.05

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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.