Home / 2,891.12-3,989.76-2,714.90

Finding the Fourth Proportional to 2,891.12, 3,989.76 and 2,714.90

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Solution

The fourth proportional to 2,891.12, 3,989.76 and 2,714.90 is: 3,746.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,891.12 : 3,989.76 = 2,714.90 : x
  2. Step 2: Convert to fraction form
    2,891.12/3,989.76 = 2,714.90/x
  3. Step 3: Cross multiply
    2,891.12x = 3,989.76 × 2,714.90
  4. Step 4: Simplify right side
    2,891.12x = 10,831,799.42
  5. Step 5: Solve for x
    x = 10,831,799.42/2,891.12
  6. Step 6: Final answer
    x = 3,746.58

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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.