Home / 20,081.36-27,712.51-11,129.02

Finding the Fourth Proportional to 20,081.36, 27,712.51 and 11,129.02

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Solution

The fourth proportional to 20,081.36, 27,712.51 and 11,129.02 is: 15,358.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,081.36 : 27,712.51 = 11,129.02 : x
  2. Step 2: Convert to fraction form
    20,081.36/27,712.51 = 11,129.02/x
  3. Step 3: Cross multiply
    20,081.36x = 27,712.51 × 11,129.02
  4. Step 4: Simplify right side
    20,081.36x = 308,413,078.04
  5. Step 5: Solve for x
    x = 308,413,078.04/20,081.36
  6. Step 6: Final answer
    x = 15,358.18

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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.