Home / 20,261.06-27,971.97-15,443.18

Finding the Fourth Proportional to 20,261.06, 27,971.97 and 15,443.18

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Solution

The fourth proportional to 20,261.06, 27,971.97 and 15,443.18 is: 21,320.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,261.06 : 27,971.97 = 15,443.18 : x
  2. Step 2: Convert to fraction form
    20,261.06/27,971.97 = 15,443.18/x
  3. Step 3: Cross multiply
    20,261.06x = 27,971.97 × 15,443.18
  4. Step 4: Simplify right side
    20,261.06x = 431,976,167.66
  5. Step 5: Solve for x
    x = 431,976,167.66/20,261.06
  6. Step 6: Final answer
    x = 21,320.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.