Home / 12,109.32-18,158.31-7,179.66

Finding the Fourth Proportional to 12,109.32, 18,158.31 and 7,179.66

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Solution

The fourth proportional to 12,109.32, 18,158.31 and 7,179.66 is: 10,766.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,109.32 : 18,158.31 = 7,179.66 : x
  2. Step 2: Convert to fraction form
    12,109.32/18,158.31 = 7,179.66/x
  3. Step 3: Cross multiply
    12,109.32x = 18,158.31 × 7,179.66
  4. Step 4: Simplify right side
    12,109.32x = 130,370,491.97
  5. Step 5: Solve for x
    x = 130,370,491.97/12,109.32
  6. Step 6: Final answer
    x = 10,766.13

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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.