Home / 12,915.87-19,374.28-3,556.61

Finding the Fourth Proportional to 12,915.87, 19,374.28 and 3,556.61

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Solution

The fourth proportional to 12,915.87, 19,374.28 and 3,556.61 is: 5,335.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,915.87 : 19,374.28 = 3,556.61 : x
  2. Step 2: Convert to fraction form
    12,915.87/19,374.28 = 3,556.61/x
  3. Step 3: Cross multiply
    12,915.87x = 19,374.28 × 3,556.61
  4. Step 4: Simplify right side
    12,915.87x = 68,906,719.88
  5. Step 5: Solve for x
    x = 68,906,719.88/12,915.87
  6. Step 6: Final answer
    x = 5,335.04

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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.