Home / 13,179.21-18,187.65-7,211.13

Finding the Fourth Proportional to 13,179.21, 18,187.65 and 7,211.13

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Solution

The fourth proportional to 13,179.21, 18,187.65 and 7,211.13 is: 9,951.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,179.21 : 18,187.65 = 7,211.13 : x
  2. Step 2: Convert to fraction form
    13,179.21/18,187.65 = 7,211.13/x
  3. Step 3: Cross multiply
    13,179.21x = 18,187.65 × 7,211.13
  4. Step 4: Simplify right side
    13,179.21x = 131,153,508.54
  5. Step 5: Solve for x
    x = 131,153,508.54/13,179.21
  6. Step 6: Final answer
    x = 9,951.55

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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.