Home / 12,081.06-18,117.93-7,149.39

Finding the Fourth Proportional to 12,081.06, 18,117.93 and 7,149.39

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Solution

The fourth proportional to 12,081.06, 18,117.93 and 7,149.39 is: 10,721.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,081.06 : 18,117.93 = 7,149.39 : x
  2. Step 2: Convert to fraction form
    12,081.06/18,117.93 = 7,149.39/x
  3. Step 3: Cross multiply
    12,081.06x = 18,117.93 × 7,149.39
  4. Step 4: Simplify right side
    12,081.06x = 129,532,147.56
  5. Step 5: Solve for x
    x = 129,532,147.56/12,081.06
  6. Step 6: Final answer
    x = 10,721.92

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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.