Home / 20,957.28-31,435.20-5,375.04

Finding the Fourth Proportional to 20,957.28, 31,435.20 and 5,375.04

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Solution

The fourth proportional to 20,957.28, 31,435.20 and 5,375.04 is: 8,062.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,957.28 : 31,435.20 = 5,375.04 : x
  2. Step 2: Convert to fraction form
    20,957.28/31,435.20 = 5,375.04/x
  3. Step 3: Cross multiply
    20,957.28x = 31,435.20 × 5,375.04
  4. Step 4: Simplify right side
    20,957.28x = 168,965,457.41
  5. Step 5: Solve for x
    x = 168,965,457.41/20,957.28
  6. Step 6: Final answer
    x = 8,062.38

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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.