Home / 21,121.23-31,669.05-10,578.99

Finding the Fourth Proportional to 21,121.23, 31,669.05 and 10,578.99

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Solution

The fourth proportional to 21,121.23, 31,669.05 and 10,578.99 is: 15,862.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121.23 : 31,669.05 = 10,578.99 : x
  2. Step 2: Convert to fraction form
    21,121.23/31,669.05 = 10,578.99/x
  3. Step 3: Cross multiply
    21,121.23x = 31,669.05 × 10,578.99
  4. Step 4: Simplify right side
    21,121.23x = 335,026,563.26
  5. Step 5: Solve for x
    x = 335,026,563.26/21,121.23
  6. Step 6: Final answer
    x = 15,862.08

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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.