Home / 3,937.56-5,909.98-1,991.14

Finding the Fourth Proportional to 3,937.56, 5,909.98 and 1,991.14

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Solution

The fourth proportional to 3,937.56, 5,909.98 and 1,991.14 is: 2,988.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,937.56 : 5,909.98 = 1,991.14 : x
  2. Step 2: Convert to fraction form
    3,937.56/5,909.98 = 1,991.14/x
  3. Step 3: Cross multiply
    3,937.56x = 5,909.98 × 1,991.14
  4. Step 4: Simplify right side
    3,937.56x = 11,767,597.58
  5. Step 5: Solve for x
    x = 11,767,597.58/3,937.56
  6. Step 6: Final answer
    x = 2,988.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.