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Finding the Fourth Proportional to 18,156, 25,055.28 and 11,081.28

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Solution

The fourth proportional to 18,156, 25,055.28 and 11,081.28 is: 15,292.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,156 : 25,055.28 = 11,081.28 : x
  2. Step 2: Convert to fraction form
    18,156/25,055.28 = 11,081.28/x
  3. Step 3: Cross multiply
    18,156x = 25,055.28 × 11,081.28
  4. Step 4: Simplify right side
    18,156x = 277,644,573.16
  5. Step 5: Solve for x
    x = 277,644,573.16/18,156
  6. Step 6: Final answer
    x = 15,292.17

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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.