Home / 3,031.20-4,181.76-1,981.92

Finding the Fourth Proportional to 3,031.20, 4,181.76 and 1,981.92

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Solution

The fourth proportional to 3,031.20, 4,181.76 and 1,981.92 is: 2,734.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,031.20 : 4,181.76 = 1,981.92 : x
  2. Step 2: Convert to fraction form
    3,031.20/4,181.76 = 1,981.92/x
  3. Step 3: Cross multiply
    3,031.20x = 4,181.76 × 1,981.92
  4. Step 4: Simplify right side
    3,031.20x = 8,287,913.78
  5. Step 5: Solve for x
    x = 8,287,913.78/3,031.20
  6. Step 6: Final answer
    x = 2,734.20

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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.