Home / 11,129.86-16,719.36-6,749.92

Finding the Fourth Proportional to 11,129.86, 16,719.36 and 6,749.92

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Solution

The fourth proportional to 11,129.86, 16,719.36 and 6,749.92 is: 10,139.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,129.86 : 16,719.36 = 6,749.92 : x
  2. Step 2: Convert to fraction form
    11,129.86/16,719.36 = 6,749.92/x
  3. Step 3: Cross multiply
    11,129.86x = 16,719.36 × 6,749.92
  4. Step 4: Simplify right side
    11,129.86x = 112,854,342.45
  5. Step 5: Solve for x
    x = 112,854,342.45/11,129.86
  6. Step 6: Final answer
    x = 10,139.78

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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.