Home / 3,102.50-4,278.96-2,107.40

Finding the Fourth Proportional to 3,102.50, 4,278.96 and 2,107.40

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Solution

The fourth proportional to 3,102.50, 4,278.96 and 2,107.40 is: 2,906.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,102.50 : 4,278.96 = 2,107.40 : x
  2. Step 2: Convert to fraction form
    3,102.50/4,278.96 = 2,107.40/x
  3. Step 3: Cross multiply
    3,102.50x = 4,278.96 × 2,107.40
  4. Step 4: Simplify right side
    3,102.50x = 9,017,480.30
  5. Step 5: Solve for x
    x = 9,017,480.30/3,102.50
  6. Step 6: Final answer
    x = 2,906.52

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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.