Home / 12,581.92-18,869.64-5,188.48

Finding the Fourth Proportional to 12,581.92, 18,869.64 and 5,188.48

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Solution

The fourth proportional to 12,581.92, 18,869.64 and 5,188.48 is: 7,781.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,581.92 : 18,869.64 = 5,188.48 : x
  2. Step 2: Convert to fraction form
    12,581.92/18,869.64 = 5,188.48/x
  3. Step 3: Cross multiply
    12,581.92x = 18,869.64 × 5,188.48
  4. Step 4: Simplify right side
    12,581.92x = 97,904,749.75
  5. Step 5: Solve for x
    x = 97,904,749.75/12,581.92
  6. Step 6: Final answer
    x = 7,781.38

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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.