Home / 20,822.13-31,233.10-5,239.76

Finding the Fourth Proportional to 20,822.13, 31,233.10 and 5,239.76

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Solution

The fourth proportional to 20,822.13, 31,233.10 and 5,239.76 is: 7,859.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,822.13 : 31,233.10 = 5,239.76 : x
  2. Step 2: Convert to fraction form
    20,822.13/31,233.10 = 5,239.76/x
  3. Step 3: Cross multiply
    20,822.13x = 31,233.10 × 5,239.76
  4. Step 4: Simplify right side
    20,822.13x = 163,653,948.06
  5. Step 5: Solve for x
    x = 163,653,948.06/20,822.13
  6. Step 6: Final answer
    x = 7,859.62

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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.