Home / 20,915.78-31,377.52-6,876.60

Finding the Fourth Proportional to 20,915.78, 31,377.52 and 6,876.60

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Solution

The fourth proportional to 20,915.78, 31,377.52 and 6,876.60 is: 10,316.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.78 : 31,377.52 = 6,876.60 : x
  2. Step 2: Convert to fraction form
    20,915.78/31,377.52 = 6,876.60/x
  3. Step 3: Cross multiply
    20,915.78x = 31,377.52 × 6,876.60
  4. Step 4: Simplify right side
    20,915.78x = 215,770,654.03
  5. Step 5: Solve for x
    x = 215,770,654.03/20,915.78
  6. Step 6: Final answer
    x = 10,316.17

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.