Home / 12,125.79-18,195.66-5,105.25

Finding the Fourth Proportional to 12,125.79, 18,195.66 and 5,105.25

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Solution

The fourth proportional to 12,125.79, 18,195.66 and 5,105.25 is: 7,660.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,125.79 : 18,195.66 = 5,105.25 : x
  2. Step 2: Convert to fraction form
    12,125.79/18,195.66 = 5,105.25/x
  3. Step 3: Cross multiply
    12,125.79x = 18,195.66 × 5,105.25
  4. Step 4: Simplify right side
    12,125.79x = 92,893,393.22
  5. Step 5: Solve for x
    x = 92,893,393.22/12,125.79
  6. Step 6: Final answer
    x = 7,660.81

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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.