Home / 11,412.78-15,749.69-6,376.61

Finding the Fourth Proportional to 11,412.78, 15,749.69 and 6,376.61

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Solution

The fourth proportional to 11,412.78, 15,749.69 and 6,376.61 is: 8,799.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,412.78 : 15,749.69 = 6,376.61 : x
  2. Step 2: Convert to fraction form
    11,412.78/15,749.69 = 6,376.61/x
  3. Step 3: Cross multiply
    11,412.78x = 15,749.69 × 6,376.61
  4. Step 4: Simplify right side
    11,412.78x = 100,429,520.12
  5. Step 5: Solve for x
    x = 100,429,520.12/11,412.78
  6. Step 6: Final answer
    x = 8,799.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.