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Finding the Fourth Proportional to 5,704, 7,867.20 and 3,938.56

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Solution

The fourth proportional to 5,704, 7,867.20 and 3,938.56 is: 5,432.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,704 : 7,867.20 = 3,938.56 : x
  2. Step 2: Convert to fraction form
    5,704/7,867.20 = 3,938.56/x
  3. Step 3: Cross multiply
    5,704x = 7,867.20 × 3,938.56
  4. Step 4: Simplify right side
    5,704x = 30,985,439.23
  5. Step 5: Solve for x
    x = 30,985,439.23/5,704
  6. Step 6: Final answer
    x = 5,432.23

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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.