Home / 7,982.31-11,973.47-2,138.76

Finding the Fourth Proportional to 7,982.31, 11,973.47 and 2,138.76

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Solution

The fourth proportional to 7,982.31, 11,973.47 and 2,138.76 is: 3,208.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,982.31 : 11,973.47 = 2,138.76 : x
  2. Step 2: Convert to fraction form
    7,982.31/11,973.47 = 2,138.76/x
  3. Step 3: Cross multiply
    7,982.31x = 11,973.47 × 2,138.76
  4. Step 4: Simplify right side
    7,982.31x = 25,608,368.00
  5. Step 5: Solve for x
    x = 25,608,368.00/7,982.31
  6. Step 6: Final answer
    x = 3,208.14

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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.