Home / 25,945.78-38,930.20-12,612.82

Finding the Fourth Proportional to 25,945.78, 38,930.20 and 12,612.82

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Solution

The fourth proportional to 25,945.78, 38,930.20 and 12,612.82 is: 18,924.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,945.78 : 38,930.20 = 12,612.82 : x
  2. Step 2: Convert to fraction form
    25,945.78/38,930.20 = 12,612.82/x
  3. Step 3: Cross multiply
    25,945.78x = 38,930.20 × 12,612.82
  4. Step 4: Simplify right side
    25,945.78x = 491,019,605.16
  5. Step 5: Solve for x
    x = 491,019,605.16/25,945.78
  6. Step 6: Final answer
    x = 18,924.83

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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.