Home / 2,877.20-3,970.12-1,635.12

Finding the Fourth Proportional to 2,877.20, 3,970.12 and 1,635.12

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Solution

The fourth proportional to 2,877.20, 3,970.12 and 1,635.12 is: 2,256.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,877.20 : 3,970.12 = 1,635.12 : x
  2. Step 2: Convert to fraction form
    2,877.20/3,970.12 = 1,635.12/x
  3. Step 3: Cross multiply
    2,877.20x = 3,970.12 × 1,635.12
  4. Step 4: Simplify right side
    2,877.20x = 6,491,622.61
  5. Step 5: Solve for x
    x = 6,491,622.61/2,877.20
  6. Step 6: Final answer
    x = 2,256.23

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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.