Home / 2,887.39-3,983.92-2,091.90

Finding the Fourth Proportional to 2,887.39, 3,983.92 and 2,091.90

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Solution

The fourth proportional to 2,887.39, 3,983.92 and 2,091.90 is: 2,886.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,887.39 : 3,983.92 = 2,091.90 : x
  2. Step 2: Convert to fraction form
    2,887.39/3,983.92 = 2,091.90/x
  3. Step 3: Cross multiply
    2,887.39x = 3,983.92 × 2,091.90
  4. Step 4: Simplify right side
    2,887.39x = 8,333,962.25
  5. Step 5: Solve for x
    x = 8,333,962.25/2,887.39
  6. Step 6: Final answer
    x = 2,886.33

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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.