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Finding the Fourth Proportional to 3,986.42, 5,503.04 and 2,872.87

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Solution

The fourth proportional to 3,986.42, 5,503.04 and 2,872.87 is: 3,965.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,986.42 : 5,503.04 = 2,872.87 : x
  2. Step 2: Convert to fraction form
    3,986.42/5,503.04 = 2,872.87/x
  3. Step 3: Cross multiply
    3,986.42x = 5,503.04 × 2,872.87
  4. Step 4: Simplify right side
    3,986.42x = 15,809,501.18
  5. Step 5: Solve for x
    x = 15,809,501.18/3,986.42
  6. Step 6: Final answer
    x = 3,965.84

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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.