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Finding the Fourth Proportional to 3,617.90, 4,990.10 and 2,126.12

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Solution

The fourth proportional to 3,617.90, 4,990.10 and 2,126.12 is: 2,932.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,617.90 : 4,990.10 = 2,126.12 : x
  2. Step 2: Convert to fraction form
    3,617.90/4,990.10 = 2,126.12/x
  3. Step 3: Cross multiply
    3,617.90x = 4,990.10 × 2,126.12
  4. Step 4: Simplify right side
    3,617.90x = 10,609,515.83
  5. Step 5: Solve for x
    x = 10,609,515.83/3,617.90
  6. Step 6: Final answer
    x = 2,932.51

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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.