Home / 20,952.12-31,428.36-5,369.88

Finding the Fourth Proportional to 20,952.12, 31,428.36 and 5,369.88

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Solution

The fourth proportional to 20,952.12, 31,428.36 and 5,369.88 is: 8,054.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,952.12 : 31,428.36 = 5,369.88 : x
  2. Step 2: Convert to fraction form
    20,952.12/31,428.36 = 5,369.88/x
  3. Step 3: Cross multiply
    20,952.12x = 31,428.36 × 5,369.88
  4. Step 4: Simplify right side
    20,952.12x = 168,766,521.80
  5. Step 5: Solve for x
    x = 168,766,521.80/20,952.12
  6. Step 6: Final answer
    x = 8,054.87

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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.