Home / 11,849.78-17,781.55-7,179.11

Finding the Fourth Proportional to 11,849.78, 17,781.55 and 7,179.11

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Solution

The fourth proportional to 11,849.78, 17,781.55 and 7,179.11 is: 10,772.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,849.78 : 17,781.55 = 7,179.11 : x
  2. Step 2: Convert to fraction form
    11,849.78/17,781.55 = 7,179.11/x
  3. Step 3: Cross multiply
    11,849.78x = 17,781.55 × 7,179.11
  4. Step 4: Simplify right side
    11,849.78x = 127,655,729.93
  5. Step 5: Solve for x
    x = 127,655,729.93/11,849.78
  6. Step 6: Final answer
    x = 10,772.84

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1.5x scale

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.