Home / 2,860.20-3,948.19-2,781.20

Finding the Fourth Proportional to 2,860.20, 3,948.19 and 2,781.20

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Solution

The fourth proportional to 2,860.20, 3,948.19 and 2,781.20 is: 3,839.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,860.20 : 3,948.19 = 2,781.20 : x
  2. Step 2: Convert to fraction form
    2,860.20/3,948.19 = 2,781.20/x
  3. Step 3: Cross multiply
    2,860.20x = 3,948.19 × 2,781.20
  4. Step 4: Simplify right side
    2,860.20x = 10,980,698.43
  5. Step 5: Solve for x
    x = 10,980,698.43/2,860.20
  6. Step 6: Final answer
    x = 3,839.13

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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.