Home / 12,581.44-18,876.10-5,189.38

Finding the Fourth Proportional to 12,581.44, 18,876.10 and 5,189.38

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Solution

The fourth proportional to 12,581.44, 18,876.10 and 5,189.38 is: 7,785.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,581.44 : 18,876.10 = 5,189.38 : x
  2. Step 2: Convert to fraction form
    12,581.44/18,876.10 = 5,189.38/x
  3. Step 3: Cross multiply
    12,581.44x = 18,876.10 × 5,189.38
  4. Step 4: Simplify right side
    12,581.44x = 97,955,255.82
  5. Step 5: Solve for x
    x = 97,955,255.82/12,581.44
  6. Step 6: Final answer
    x = 7,785.70

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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.