Home / 3,988.67-5,506.85-2,868.84

Finding the Fourth Proportional to 3,988.67, 5,506.85 and 2,868.84

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Solution

The fourth proportional to 3,988.67, 5,506.85 and 2,868.84 is: 3,960.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.67 : 5,506.85 = 2,868.84 : x
  2. Step 2: Convert to fraction form
    3,988.67/5,506.85 = 2,868.84/x
  3. Step 3: Cross multiply
    3,988.67x = 5,506.85 × 2,868.84
  4. Step 4: Simplify right side
    3,988.67x = 15,798,278.73
  5. Step 5: Solve for x
    x = 15,798,278.73/3,988.67
  6. Step 6: Final answer
    x = 3,960.79

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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.