Home / 3,972.32-5,481.78-2,400.12

Finding the Fourth Proportional to 3,972.32, 5,481.78 and 2,400.12

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Solution

The fourth proportional to 3,972.32, 5,481.78 and 2,400.12 is: 3,312.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,972.32 : 5,481.78 = 2,400.12 : x
  2. Step 2: Convert to fraction form
    3,972.32/5,481.78 = 2,400.12/x
  3. Step 3: Cross multiply
    3,972.32x = 5,481.78 × 2,400.12
  4. Step 4: Simplify right side
    3,972.32x = 13,156,929.81
  5. Step 5: Solve for x
    x = 13,156,929.81/3,972.32
  6. Step 6: Final answer
    x = 3,312.15

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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.