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Finding the Fourth Proportional to 18,138.72, 25,034.14 and 11,069.22

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Solution

The fourth proportional to 18,138.72, 25,034.14 and 11,069.22 is: 15,277.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,138.72 : 25,034.14 = 11,069.22 : x
  2. Step 2: Convert to fraction form
    18,138.72/25,034.14 = 11,069.22/x
  3. Step 3: Cross multiply
    18,138.72x = 25,034.14 × 11,069.22
  4. Step 4: Simplify right side
    18,138.72x = 277,108,403.17
  5. Step 5: Solve for x
    x = 277,108,403.17/18,138.72
  6. Step 6: Final answer
    x = 15,277.18

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Half scale
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Double scale
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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.