Home / 2,987.41-4,122.75-2,103.49

Finding the Fourth Proportional to 2,987.41, 4,122.75 and 2,103.49

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Solution

The fourth proportional to 2,987.41, 4,122.75 and 2,103.49 is: 2,902.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.41 : 4,122.75 = 2,103.49 : x
  2. Step 2: Convert to fraction form
    2,987.41/4,122.75 = 2,103.49/x
  3. Step 3: Cross multiply
    2,987.41x = 4,122.75 × 2,103.49
  4. Step 4: Simplify right side
    2,987.41x = 8,672,163.40
  5. Step 5: Solve for x
    x = 8,672,163.40/2,987.41
  6. Step 6: Final answer
    x = 2,902.90

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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.