Home / 20,291.88-27,979.98-13,112.34

Finding the Fourth Proportional to 20,291.88, 27,979.98 and 13,112.34

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Solution

The fourth proportional to 20,291.88, 27,979.98 and 13,112.34 is: 18,080.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,291.88 : 27,979.98 = 13,112.34 : x
  2. Step 2: Convert to fraction form
    20,291.88/27,979.98 = 13,112.34/x
  3. Step 3: Cross multiply
    20,291.88x = 27,979.98 × 13,112.34
  4. Step 4: Simplify right side
    20,291.88x = 366,883,010.95
  5. Step 5: Solve for x
    x = 366,883,010.95/20,291.88
  6. Step 6: Final answer
    x = 18,080.29

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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.