Home / 20,081.35-27,712.42-11,129

Finding the Fourth Proportional to 20,081.35, 27,712.42 and 11,129

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Solution

The fourth proportional to 20,081.35, 27,712.42 and 11,129 is: 15,358.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,081.35 : 27,712.42 = 11,129 : x
  2. Step 2: Convert to fraction form
    20,081.35/27,712.42 = 11,129/x
  3. Step 3: Cross multiply
    20,081.35x = 27,712.42 × 11,129
  4. Step 4: Simplify right side
    20,081.35x = 308,411,522.18
  5. Step 5: Solve for x
    x = 308,411,522.18/20,081.35
  6. Step 6: Final answer
    x = 15,358.11

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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.