Home / 12,115.78-16,708.68-7,862.44

Finding the Fourth Proportional to 12,115.78, 16,708.68 and 7,862.44

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Solution

The fourth proportional to 12,115.78, 16,708.68 and 7,862.44 is: 10,842.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,115.78 : 16,708.68 = 7,862.44 : x
  2. Step 2: Convert to fraction form
    12,115.78/16,708.68 = 7,862.44/x
  3. Step 3: Cross multiply
    12,115.78x = 16,708.68 × 7,862.44
  4. Step 4: Simplify right side
    12,115.78x = 131,370,993.98
  5. Step 5: Solve for x
    x = 131,370,993.98/12,115.78
  6. Step 6: Final answer
    x = 10,842.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.