Home / 12,872.78-19,312.25-5,372.17

Finding the Fourth Proportional to 12,872.78, 19,312.25 and 5,372.17

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Solution

The fourth proportional to 12,872.78, 19,312.25 and 5,372.17 is: 8,059.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,872.78 : 19,312.25 = 5,372.17 : x
  2. Step 2: Convert to fraction form
    12,872.78/19,312.25 = 5,372.17/x
  3. Step 3: Cross multiply
    12,872.78x = 19,312.25 × 5,372.17
  4. Step 4: Simplify right side
    12,872.78x = 103,748,645.16
  5. Step 5: Solve for x
    x = 103,748,645.16/12,872.78
  6. Step 6: Final answer
    x = 8,059.54

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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.