Home / 3,930.86-5,424.56-2,162.43

Finding the Fourth Proportional to 3,930.86, 5,424.56 and 2,162.43

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Solution

The fourth proportional to 3,930.86, 5,424.56 and 2,162.43 is: 2,984.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.86 : 5,424.56 = 2,162.43 : x
  2. Step 2: Convert to fraction form
    3,930.86/5,424.56 = 2,162.43/x
  3. Step 3: Cross multiply
    3,930.86x = 5,424.56 × 2,162.43
  4. Step 4: Simplify right side
    3,930.86x = 11,730,193.35
  5. Step 5: Solve for x
    x = 11,730,193.35/3,930.86
  6. Step 6: Final answer
    x = 2,984.13

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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.