Home / 3,988.80-5,973.68-3,161.60

Finding the Fourth Proportional to 3,988.80, 5,973.68 and 3,161.60

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Solution

The fourth proportional to 3,988.80, 5,973.68 and 3,161.60 is: 4,734.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.80 : 5,973.68 = 3,161.60 : x
  2. Step 2: Convert to fraction form
    3,988.80/5,973.68 = 3,161.60/x
  3. Step 3: Cross multiply
    3,988.80x = 5,973.68 × 3,161.60
  4. Step 4: Simplify right side
    3,988.80x = 18,886,386.69
  5. Step 5: Solve for x
    x = 18,886,386.69/3,988.80
  6. Step 6: Final answer
    x = 4,734.85

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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.