Home / 21,324.33-31,985.55-5,742.09

Finding the Fourth Proportional to 21,324.33, 31,985.55 and 5,742.09

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Solution

The fourth proportional to 21,324.33, 31,985.55 and 5,742.09 is: 8,612.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,324.33 : 31,985.55 = 5,742.09 : x
  2. Step 2: Convert to fraction form
    21,324.33/31,985.55 = 5,742.09/x
  3. Step 3: Cross multiply
    21,324.33x = 31,985.55 × 5,742.09
  4. Step 4: Simplify right side
    21,324.33x = 183,663,906.80
  5. Step 5: Solve for x
    x = 183,663,906.80/21,324.33
  6. Step 6: Final answer
    x = 8,612.88

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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.