Home / 2,138.90-2,952.33-1,353.20

Finding the Fourth Proportional to 2,138.90, 2,952.33 and 1,353.20

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Solution

The fourth proportional to 2,138.90, 2,952.33 and 1,353.20 is: 1,867.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.90 : 2,952.33 = 1,353.20 : x
  2. Step 2: Convert to fraction form
    2,138.90/2,952.33 = 1,353.20/x
  3. Step 3: Cross multiply
    2,138.90x = 2,952.33 × 1,353.20
  4. Step 4: Simplify right side
    2,138.90x = 3,995,092.96
  5. Step 5: Solve for x
    x = 3,995,092.96/2,138.90
  6. Step 6: Final answer
    x = 1,867.83

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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.