Home / 20,971.24-31,456.74-5,388.76

Finding the Fourth Proportional to 20,971.24, 31,456.74 and 5,388.76

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Solution

The fourth proportional to 20,971.24, 31,456.74 and 5,388.76 is: 8,083.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,971.24 : 31,456.74 = 5,388.76 : x
  2. Step 2: Convert to fraction form
    20,971.24/31,456.74 = 5,388.76/x
  3. Step 3: Cross multiply
    20,971.24x = 31,456.74 × 5,388.76
  4. Step 4: Simplify right side
    20,971.24x = 169,512,822.24
  5. Step 5: Solve for x
    x = 169,512,822.24/20,971.24
  6. Step 6: Final answer
    x = 8,083.11

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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.