Home / 21,061.13-31,593.51-5,478.75

Finding the Fourth Proportional to 21,061.13, 31,593.51 and 5,478.75

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Solution

The fourth proportional to 21,061.13, 31,593.51 and 5,478.75 is: 8,218.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,061.13 : 31,593.51 = 5,478.75 : x
  2. Step 2: Convert to fraction form
    21,061.13/31,593.51 = 5,478.75/x
  3. Step 3: Cross multiply
    21,061.13x = 31,593.51 × 5,478.75
  4. Step 4: Simplify right side
    21,061.13x = 173,092,942.91
  5. Step 5: Solve for x
    x = 173,092,942.91/21,061.13
  6. Step 6: Final answer
    x = 8,218.60

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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.