Home / 2,987.11-4,141.37-2,821.03

Finding the Fourth Proportional to 2,987.11, 4,141.37 and 2,821.03

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Solution

The fourth proportional to 2,987.11, 4,141.37 and 2,821.03 is: 3,911.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.11 : 4,141.37 = 2,821.03 : x
  2. Step 2: Convert to fraction form
    2,987.11/4,141.37 = 2,821.03/x
  3. Step 3: Cross multiply
    2,987.11x = 4,141.37 × 2,821.03
  4. Step 4: Simplify right side
    2,987.11x = 11,682,925.67
  5. Step 5: Solve for x
    x = 11,682,925.67/2,987.11
  6. Step 6: Final answer
    x = 3,911.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.