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Finding the Fourth Proportional to 18,220.61, 25,144.59 and 11,048.15

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Solution

The fourth proportional to 18,220.61, 25,144.59 and 11,048.15 is: 15,246.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,220.61 : 25,144.59 = 11,048.15 : x
  2. Step 2: Convert to fraction form
    18,220.61/25,144.59 = 11,048.15/x
  3. Step 3: Cross multiply
    18,220.61x = 25,144.59 × 11,048.15
  4. Step 4: Simplify right side
    18,220.61x = 277,801,076.29
  5. Step 5: Solve for x
    x = 277,801,076.29/18,220.61
  6. Step 6: Final answer
    x = 15,246.53

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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.