Home / 21,137.33-31,696.41-7,980.37

Finding the Fourth Proportional to 21,137.33, 31,696.41 and 7,980.37

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Solution

The fourth proportional to 21,137.33, 31,696.41 and 7,980.37 is: 11,966.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,137.33 : 31,696.41 = 7,980.37 : x
  2. Step 2: Convert to fraction form
    21,137.33/31,696.41 = 7,980.37/x
  3. Step 3: Cross multiply
    21,137.33x = 31,696.41 × 7,980.37
  4. Step 4: Simplify right side
    21,137.33x = 252,948,920.99
  5. Step 5: Solve for x
    x = 252,948,920.99/21,137.33
  6. Step 6: Final answer
    x = 11,966.93

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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.