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Finding the Fourth Proportional to 8,239.40, 12,359.14 and 2,083.40

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Solution

The fourth proportional to 8,239.40, 12,359.14 and 2,083.40 is: 3,125.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,239.40 : 12,359.14 = 2,083.40 : x
  2. Step 2: Convert to fraction form
    8,239.40/12,359.14 = 2,083.40/x
  3. Step 3: Cross multiply
    8,239.40x = 12,359.14 × 2,083.40
  4. Step 4: Simplify right side
    8,239.40x = 25,749,032.28
  5. Step 5: Solve for x
    x = 25,749,032.28/8,239.40
  6. Step 6: Final answer
    x = 3,125.11

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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.