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Finding the Fourth Proportional to 3,987.74, 5,503.10 and 2,195.23

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Solution

The fourth proportional to 3,987.74, 5,503.10 and 2,195.23 is: 3,029.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.74 : 5,503.10 = 2,195.23 : x
  2. Step 2: Convert to fraction form
    3,987.74/5,503.10 = 2,195.23/x
  3. Step 3: Cross multiply
    3,987.74x = 5,503.10 × 2,195.23
  4. Step 4: Simplify right side
    3,987.74x = 12,080,570.21
  5. Step 5: Solve for x
    x = 12,080,570.21/3,987.74
  6. Step 6: Final answer
    x = 3,029.43

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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.