Home / 20,887.72-31,331.21-5,092.88

Finding the Fourth Proportional to 20,887.72, 31,331.21 and 5,092.88

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Solution

The fourth proportional to 20,887.72, 31,331.21 and 5,092.88 is: 7,639.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,887.72 : 31,331.21 = 5,092.88 : x
  2. Step 2: Convert to fraction form
    20,887.72/31,331.21 = 5,092.88/x
  3. Step 3: Cross multiply
    20,887.72x = 31,331.21 × 5,092.88
  4. Step 4: Simplify right side
    20,887.72x = 159,565,910.66
  5. Step 5: Solve for x
    x = 159,565,910.66/20,887.72
  6. Step 6: Final answer
    x = 7,639.22

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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.