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Finding the Fourth Proportional to 7,321.88, 10,983.42 and 2,127.75

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Solution

The fourth proportional to 7,321.88, 10,983.42 and 2,127.75 is: 3,191.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,321.88 : 10,983.42 = 2,127.75 : x
  2. Step 2: Convert to fraction form
    7,321.88/10,983.42 = 2,127.75/x
  3. Step 3: Cross multiply
    7,321.88x = 10,983.42 × 2,127.75
  4. Step 4: Simplify right side
    7,321.88x = 23,369,971.91
  5. Step 5: Solve for x
    x = 23,369,971.91/7,321.88
  6. Step 6: Final answer
    x = 3,191.80

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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.