Home / 2,887.62-4,331.68-2,117.20

Finding the Fourth Proportional to 2,887.62, 4,331.68 and 2,117.20

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Solution

The fourth proportional to 2,887.62, 4,331.68 and 2,117.20 is: 3,175.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,887.62 : 4,331.68 = 2,117.20 : x
  2. Step 2: Convert to fraction form
    2,887.62/4,331.68 = 2,117.20/x
  3. Step 3: Cross multiply
    2,887.62x = 4,331.68 × 2,117.20
  4. Step 4: Simplify right side
    2,887.62x = 9,171,032.90
  5. Step 5: Solve for x
    x = 9,171,032.90/2,887.62
  6. Step 6: Final answer
    x = 3,175.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.