Home / 20,081.64-27,712.89-11,129.32

Finding the Fourth Proportional to 20,081.64, 27,712.89 and 11,129.32

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Solution

The fourth proportional to 20,081.64, 27,712.89 and 11,129.32 is: 15,358.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,081.64 : 27,712.89 = 11,129.32 : x
  2. Step 2: Convert to fraction form
    20,081.64/27,712.89 = 11,129.32/x
  3. Step 3: Cross multiply
    20,081.64x = 27,712.89 × 11,129.32
  4. Step 4: Simplify right side
    20,081.64x = 308,425,426.72
  5. Step 5: Solve for x
    x = 308,425,426.72/20,081.64
  6. Step 6: Final answer
    x = 15,358.58

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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.