Home / 12,915.05-19,380.76-5,519.57

Finding the Fourth Proportional to 12,915.05, 19,380.76 and 5,519.57

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Solution

The fourth proportional to 12,915.05, 19,380.76 and 5,519.57 is: 8,282.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,915.05 : 19,380.76 = 5,519.57 : x
  2. Step 2: Convert to fraction form
    12,915.05/19,380.76 = 5,519.57/x
  3. Step 3: Cross multiply
    12,915.05x = 19,380.76 × 5,519.57
  4. Step 4: Simplify right side
    12,915.05x = 106,973,350.77
  5. Step 5: Solve for x
    x = 106,973,350.77/12,915.05
  6. Step 6: Final answer
    x = 8,282.85

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1.5x scale

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.