Home / 2,811.60-3,876.12-2,340.18

Finding the Fourth Proportional to 2,811.60, 3,876.12 and 2,340.18

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Solution

The fourth proportional to 2,811.60, 3,876.12 and 2,340.18 is: 3,226.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.60 : 3,876.12 = 2,340.18 : x
  2. Step 2: Convert to fraction form
    2,811.60/3,876.12 = 2,340.18/x
  3. Step 3: Cross multiply
    2,811.60x = 3,876.12 × 2,340.18
  4. Step 4: Simplify right side
    2,811.60x = 9,070,818.50
  5. Step 5: Solve for x
    x = 9,070,818.50/2,811.60
  6. Step 6: Final answer
    x = 3,226.21

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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.