Home / 20,982.29-31,473.12-5,187.49

Finding the Fourth Proportional to 20,982.29, 31,473.12 and 5,187.49

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Solution

The fourth proportional to 20,982.29, 31,473.12 and 5,187.49 is: 7,781.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,982.29 : 31,473.12 = 5,187.49 : x
  2. Step 2: Convert to fraction form
    20,982.29/31,473.12 = 5,187.49/x
  3. Step 3: Cross multiply
    20,982.29x = 31,473.12 × 5,187.49
  4. Step 4: Simplify right side
    20,982.29x = 163,266,436.04
  5. Step 5: Solve for x
    x = 163,266,436.04/20,982.29
  6. Step 6: Final answer
    x = 7,781.16

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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.