Home / 7,931.31-11,892.87-3,487.20

Finding the Fourth Proportional to 7,931.31, 11,892.87 and 3,487.20

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Solution

The fourth proportional to 7,931.31, 11,892.87 and 3,487.20 is: 5,229.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,931.31 : 11,892.87 = 3,487.20 : x
  2. Step 2: Convert to fraction form
    7,931.31/11,892.87 = 3,487.20/x
  3. Step 3: Cross multiply
    7,931.31x = 11,892.87 × 3,487.20
  4. Step 4: Simplify right side
    7,931.31x = 41,472,816.26
  5. Step 5: Solve for x
    x = 41,472,816.26/7,931.31
  6. Step 6: Final answer
    x = 5,229.00

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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.