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Finding the Fourth Proportional to 18,206.19, 25,112.30 and 11,120.31

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Solution

The fourth proportional to 18,206.19, 25,112.30 and 11,120.31 is: 15,338.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,206.19 : 25,112.30 = 11,120.31 : x
  2. Step 2: Convert to fraction form
    18,206.19/25,112.30 = 11,120.31/x
  3. Step 3: Cross multiply
    18,206.19x = 25,112.30 × 11,120.31
  4. Step 4: Simplify right side
    18,206.19x = 279,256,505.21
  5. Step 5: Solve for x
    x = 279,256,505.21/18,206.19
  6. Step 6: Final answer
    x = 15,338.55

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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.