Home / 13,278.35-19,912.88-3,915.88

Finding the Fourth Proportional to 13,278.35, 19,912.88 and 3,915.88

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Solution

The fourth proportional to 13,278.35, 19,912.88 and 3,915.88 is: 5,872.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,278.35 : 19,912.88 = 3,915.88 : x
  2. Step 2: Convert to fraction form
    13,278.35/19,912.88 = 3,915.88/x
  3. Step 3: Cross multiply
    13,278.35x = 19,912.88 × 3,915.88
  4. Step 4: Simplify right side
    13,278.35x = 77,976,438.74
  5. Step 5: Solve for x
    x = 77,976,438.74/13,278.35
  6. Step 6: Final answer
    x = 5,872.45

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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.