Home / 15,179.11-20,934.79-12,747.09

Finding the Fourth Proportional to 15,179.11, 20,934.79 and 12,747.09

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Solution

The fourth proportional to 15,179.11, 20,934.79 and 12,747.09 is: 17,580.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,179.11 : 20,934.79 = 12,747.09 : x
  2. Step 2: Convert to fraction form
    15,179.11/20,934.79 = 12,747.09/x
  3. Step 3: Cross multiply
    15,179.11x = 20,934.79 × 12,747.09
  4. Step 4: Simplify right side
    15,179.11x = 266,857,652.26
  5. Step 5: Solve for x
    x = 266,857,652.26/15,179.11
  6. Step 6: Final answer
    x = 17,580.59

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1.5x scale

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.