Home / 21,126.33-31,698-7,982.46

Finding the Fourth Proportional to 21,126.33, 31,698 and 7,982.46

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Solution

The fourth proportional to 21,126.33, 31,698 and 7,982.46 is: 11,976.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,126.33 : 31,698 = 7,982.46 : x
  2. Step 2: Convert to fraction form
    21,126.33/31,698 = 7,982.46/x
  3. Step 3: Cross multiply
    21,126.33x = 31,698 × 7,982.46
  4. Step 4: Simplify right side
    21,126.33x = 253,028,017.08
  5. Step 5: Solve for x
    x = 253,028,017.08/21,126.33
  6. Step 6: Final answer
    x = 11,976.90

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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.