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Finding the Fourth Proportional to 12,079.04, 18,118.46 and 7,945.16

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Solution

The fourth proportional to 12,079.04, 18,118.46 and 7,945.16 is: 11,917.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,079.04 : 18,118.46 = 7,945.16 : x
  2. Step 2: Convert to fraction form
    12,079.04/18,118.46 = 7,945.16/x
  3. Step 3: Cross multiply
    12,079.04x = 18,118.46 × 7,945.16
  4. Step 4: Simplify right side
    12,079.04x = 143,954,063.65
  5. Step 5: Solve for x
    x = 143,954,063.65/12,079.04
  6. Step 6: Final answer
    x = 11,917.67

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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.