Home / 2,781.68-4,172.13-1,946.21

Finding the Fourth Proportional to 2,781.68, 4,172.13 and 1,946.21

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Solution

The fourth proportional to 2,781.68, 4,172.13 and 1,946.21 is: 2,919.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.68 : 4,172.13 = 1,946.21 : x
  2. Step 2: Convert to fraction form
    2,781.68/4,172.13 = 1,946.21/x
  3. Step 3: Cross multiply
    2,781.68x = 4,172.13 × 1,946.21
  4. Step 4: Simplify right side
    2,781.68x = 8,119,820.27
  5. Step 5: Solve for x
    x = 8,119,820.27/2,781.68
  6. Step 6: Final answer
    x = 2,919.04

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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.