Home / 23,129.78-31,919.08-12,519.41

Finding the Fourth Proportional to 23,129.78, 31,919.08 and 12,519.41

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Solution

The fourth proportional to 23,129.78, 31,919.08 and 12,519.41 is: 17,276.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,129.78 : 31,919.08 = 12,519.41 : x
  2. Step 2: Convert to fraction form
    23,129.78/31,919.08 = 12,519.41/x
  3. Step 3: Cross multiply
    23,129.78x = 31,919.08 × 12,519.41
  4. Step 4: Simplify right side
    23,129.78x = 399,608,049.34
  5. Step 5: Solve for x
    x = 399,608,049.34/23,129.78
  6. Step 6: Final answer
    x = 17,276.78

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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.