Home / 7,708.91-10,638.35-4,172.12

Finding the Fourth Proportional to 7,708.91, 10,638.35 and 4,172.12

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Solution

The fourth proportional to 7,708.91, 10,638.35 and 4,172.12 is: 5,757.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,708.91 : 10,638.35 = 4,172.12 : x
  2. Step 2: Convert to fraction form
    7,708.91/10,638.35 = 4,172.12/x
  3. Step 3: Cross multiply
    7,708.91x = 10,638.35 × 4,172.12
  4. Step 4: Simplify right side
    7,708.91x = 44,384,398.75
  5. Step 5: Solve for x
    x = 44,384,398.75/7,708.91
  6. Step 6: Final answer
    x = 5,757.55

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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.