Home / 20,959.40-31,439.12-5,377.04

Finding the Fourth Proportional to 20,959.40, 31,439.12 and 5,377.04

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Solution

The fourth proportional to 20,959.40, 31,439.12 and 5,377.04 is: 8,065.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,959.40 : 31,439.12 = 5,377.04 : x
  2. Step 2: Convert to fraction form
    20,959.40/31,439.12 = 5,377.04/x
  3. Step 3: Cross multiply
    20,959.40x = 31,439.12 × 5,377.04
  4. Step 4: Simplify right side
    20,959.40x = 169,049,405.80
  5. Step 5: Solve for x
    x = 169,049,405.80/20,959.40
  6. Step 6: Final answer
    x = 8,065.57

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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.