Home / 2,887.20-3,965.40-2,671.20

Finding the Fourth Proportional to 2,887.20, 3,965.40 and 2,671.20

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Solution

The fourth proportional to 2,887.20, 3,965.40 and 2,671.20 is: 3,668.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,887.20 : 3,965.40 = 2,671.20 : x
  2. Step 2: Convert to fraction form
    2,887.20/3,965.40 = 2,671.20/x
  3. Step 3: Cross multiply
    2,887.20x = 3,965.40 × 2,671.20
  4. Step 4: Simplify right side
    2,887.20x = 10,592,376.48
  5. Step 5: Solve for x
    x = 10,592,376.48/2,887.20
  6. Step 6: Final answer
    x = 3,668.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.