Home / 20,957.90-31,436.85-5,375.53

Finding the Fourth Proportional to 20,957.90, 31,436.85 and 5,375.53

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Solution

The fourth proportional to 20,957.90, 31,436.85 and 5,375.53 is: 8,063.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,957.90 : 31,436.85 = 5,375.53 : x
  2. Step 2: Convert to fraction form
    20,957.90/31,436.85 = 5,375.53/x
  3. Step 3: Cross multiply
    20,957.90x = 31,436.85 × 5,375.53
  4. Step 4: Simplify right side
    20,957.90x = 168,989,730.28
  5. Step 5: Solve for x
    x = 168,989,730.28/20,957.90
  6. Step 6: Final answer
    x = 8,063.30

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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.