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Finding the Fourth Proportional to 6,321.71, 9,479.43 and 1,938.11

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Solution

The fourth proportional to 6,321.71, 9,479.43 and 1,938.11 is: 2,906.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,321.71 : 9,479.43 = 1,938.11 : x
  2. Step 2: Convert to fraction form
    6,321.71/9,479.43 = 1,938.11/x
  3. Step 3: Cross multiply
    6,321.71x = 9,479.43 × 1,938.11
  4. Step 4: Simplify right side
    6,321.71x = 18,372,130.68
  5. Step 5: Solve for x
    x = 18,372,130.68/6,321.71
  6. Step 6: Final answer
    x = 2,906.20

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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.