Home / 3,127.72-4,691.60-938.12

Finding the Fourth Proportional to 3,127.72, 4,691.60 and 938.12

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Solution

The fourth proportional to 3,127.72, 4,691.60 and 938.12 is: 1,407.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,127.72 : 4,691.60 = 938.12 : x
  2. Step 2: Convert to fraction form
    3,127.72/4,691.60 = 938.12/x
  3. Step 3: Cross multiply
    3,127.72x = 4,691.60 × 938.12
  4. Step 4: Simplify right side
    3,127.72x = 4,401,283.79
  5. Step 5: Solve for x
    x = 4,401,283.79/3,127.72
  6. Step 6: Final answer
    x = 1,407.19

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1.5x scale

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.