Home / 3,972.18-5,475.22-3,131.48

Finding the Fourth Proportional to 3,972.18, 5,475.22 and 3,131.48

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Solution

The fourth proportional to 3,972.18, 5,475.22 and 3,131.48 is: 4,316.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,972.18 : 5,475.22 = 3,131.48 : x
  2. Step 2: Convert to fraction form
    3,972.18/5,475.22 = 3,131.48/x
  3. Step 3: Cross multiply
    3,972.18x = 5,475.22 × 3,131.48
  4. Step 4: Simplify right side
    3,972.18x = 17,145,541.93
  5. Step 5: Solve for x
    x = 17,145,541.93/3,972.18
  6. Step 6: Final answer
    x = 4,316.41

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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.