Home / 12,515.15-18,781.97-10,079.36

Finding the Fourth Proportional to 12,515.15, 18,781.97 and 10,079.36

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Solution

The fourth proportional to 12,515.15, 18,781.97 and 10,079.36 is: 15,126.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,515.15 : 18,781.97 = 10,079.36 : x
  2. Step 2: Convert to fraction form
    12,515.15/18,781.97 = 10,079.36/x
  3. Step 3: Cross multiply
    12,515.15x = 18,781.97 × 10,079.36
  4. Step 4: Simplify right side
    12,515.15x = 189,310,233.70
  5. Step 5: Solve for x
    x = 189,310,233.70/12,515.15
  6. Step 6: Final answer
    x = 15,126.49

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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.