Home / 2,890.12-3,988.38-2,713.90

Finding the Fourth Proportional to 2,890.12, 3,988.38 and 2,713.90

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Solution

The fourth proportional to 2,890.12, 3,988.38 and 2,713.90 is: 3,745.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.12 : 3,988.38 = 2,713.90 : x
  2. Step 2: Convert to fraction form
    2,890.12/3,988.38 = 2,713.90/x
  3. Step 3: Cross multiply
    2,890.12x = 3,988.38 × 2,713.90
  4. Step 4: Simplify right side
    2,890.12x = 10,824,064.48
  5. Step 5: Solve for x
    x = 10,824,064.48/2,890.12
  6. Step 6: Final answer
    x = 3,745.20

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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.