Home / 12,113.91-18,132.79-8,343.56

Finding the Fourth Proportional to 12,113.91, 18,132.79 and 8,343.56

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Solution

The fourth proportional to 12,113.91, 18,132.79 and 8,343.56 is: 12,489.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,113.91 : 18,132.79 = 8,343.56 : x
  2. Step 2: Convert to fraction form
    12,113.91/18,132.79 = 8,343.56/x
  3. Step 3: Cross multiply
    12,113.91x = 18,132.79 × 8,343.56
  4. Step 4: Simplify right side
    12,113.91x = 151,292,021.33
  5. Step 5: Solve for x
    x = 151,292,021.33/12,113.91
  6. Step 6: Final answer
    x = 12,489.12

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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.