Home / 6,681.40-9,219.27-3,991.78

Finding the Fourth Proportional to 6,681.40, 9,219.27 and 3,991.78

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Solution

The fourth proportional to 6,681.40, 9,219.27 and 3,991.78 is: 5,508.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,681.40 : 9,219.27 = 3,991.78 : x
  2. Step 2: Convert to fraction form
    6,681.40/9,219.27 = 3,991.78/x
  3. Step 3: Cross multiply
    6,681.40x = 9,219.27 × 3,991.78
  4. Step 4: Simplify right side
    6,681.40x = 36,801,297.60
  5. Step 5: Solve for x
    x = 36,801,297.60/6,681.40
  6. Step 6: Final answer
    x = 5,508.02

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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.