Home / 3,988.40-5,972.12-2,812.03

Finding the Fourth Proportional to 3,988.40, 5,972.12 and 2,812.03

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Solution

The fourth proportional to 3,988.40, 5,972.12 and 2,812.03 is: 4,210.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.40 : 5,972.12 = 2,812.03 : x
  2. Step 2: Convert to fraction form
    3,988.40/5,972.12 = 2,812.03/x
  3. Step 3: Cross multiply
    3,988.40x = 5,972.12 × 2,812.03
  4. Step 4: Simplify right side
    3,988.40x = 16,793,780.60
  5. Step 5: Solve for x
    x = 16,793,780.60/3,988.40
  6. Step 6: Final answer
    x = 4,210.66

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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.