Home / 10,491.20-15,737.88-3,915.64

Finding the Fourth Proportional to 10,491.20, 15,737.88 and 3,915.64

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Solution

The fourth proportional to 10,491.20, 15,737.88 and 3,915.64 is: 5,873.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,491.20 : 15,737.88 = 3,915.64 : x
  2. Step 2: Convert to fraction form
    10,491.20/15,737.88 = 3,915.64/x
  3. Step 3: Cross multiply
    10,491.20x = 15,737.88 × 3,915.64
  4. Step 4: Simplify right side
    10,491.20x = 61,623,872.44
  5. Step 5: Solve for x
    x = 61,623,872.44/10,491.20
  6. Step 6: Final answer
    x = 5,873.86

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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.