Home / 21,988.72-33,027.19-13,121.34

Finding the Fourth Proportional to 21,988.72, 33,027.19 and 13,121.34

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Solution

The fourth proportional to 21,988.72, 33,027.19 and 13,121.34 is: 19,708.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,988.72 : 33,027.19 = 13,121.34 : x
  2. Step 2: Convert to fraction form
    21,988.72/33,027.19 = 13,121.34/x
  3. Step 3: Cross multiply
    21,988.72x = 33,027.19 × 13,121.34
  4. Step 4: Simplify right side
    21,988.72x = 433,361,092.16
  5. Step 5: Solve for x
    x = 433,361,092.16/21,988.72
  6. Step 6: Final answer
    x = 19,708.34

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1.5x scale

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.