Home / 20,915.58-31,375.26-7,763.88

Finding the Fourth Proportional to 20,915.58, 31,375.26 and 7,763.88

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Solution

The fourth proportional to 20,915.58, 31,375.26 and 7,763.88 is: 11,646.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.58 : 31,375.26 = 7,763.88 : x
  2. Step 2: Convert to fraction form
    20,915.58/31,375.26 = 7,763.88/x
  3. Step 3: Cross multiply
    20,915.58x = 31,375.26 × 7,763.88
  4. Step 4: Simplify right side
    20,915.58x = 243,593,753.61
  5. Step 5: Solve for x
    x = 243,593,753.61/20,915.58
  6. Step 6: Final answer
    x = 11,646.52

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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.