Home / 3,989.67-5,506.11-2,221.54

Finding the Fourth Proportional to 3,989.67, 5,506.11 and 2,221.54

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Solution

The fourth proportional to 3,989.67, 5,506.11 and 2,221.54 is: 3,065.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.67 : 5,506.11 = 2,221.54 : x
  2. Step 2: Convert to fraction form
    3,989.67/5,506.11 = 2,221.54/x
  3. Step 3: Cross multiply
    3,989.67x = 5,506.11 × 2,221.54
  4. Step 4: Simplify right side
    3,989.67x = 12,232,029.84
  5. Step 5: Solve for x
    x = 12,232,029.84/3,989.67
  6. Step 6: Final answer
    x = 3,065.93

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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.