Home / 21,058.80-31,554.99-13,647.30

Finding the Fourth Proportional to 21,058.80, 31,554.99 and 13,647.30

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Solution

The fourth proportional to 21,058.80, 31,554.99 and 13,647.30 is: 20,449.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,058.80 : 31,554.99 = 13,647.30 : x
  2. Step 2: Convert to fraction form
    21,058.80/31,554.99 = 13,647.30/x
  3. Step 3: Cross multiply
    21,058.80x = 31,554.99 × 13,647.30
  4. Step 4: Simplify right side
    21,058.80x = 430,640,415.03
  5. Step 5: Solve for x
    x = 430,640,415.03/21,058.80
  6. Step 6: Final answer
    x = 20,449.43

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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.