Home / 3,938.10-5,912.55-3,117.30

Finding the Fourth Proportional to 3,938.10, 5,912.55 and 3,117.30

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Solution

The fourth proportional to 3,938.10, 5,912.55 and 3,117.30 is: 4,680.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.10 : 5,912.55 = 3,117.30 : x
  2. Step 2: Convert to fraction form
    3,938.10/5,912.55 = 3,117.30/x
  3. Step 3: Cross multiply
    3,938.10x = 5,912.55 × 3,117.30
  4. Step 4: Simplify right side
    3,938.10x = 18,431,192.12
  5. Step 5: Solve for x
    x = 18,431,192.12/3,938.10
  6. Step 6: Final answer
    x = 4,680.22

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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.