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Finding the Fourth Proportional to 18,295.16, 25,243.32 and 11,921.12

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Solution

The fourth proportional to 18,295.16, 25,243.32 and 11,921.12 is: 16,448.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,295.16 : 25,243.32 = 11,921.12 : x
  2. Step 2: Convert to fraction form
    18,295.16/25,243.32 = 11,921.12/x
  3. Step 3: Cross multiply
    18,295.16x = 25,243.32 × 11,921.12
  4. Step 4: Simplify right side
    18,295.16x = 300,928,646.92
  5. Step 5: Solve for x
    x = 300,928,646.92/18,295.16
  6. Step 6: Final answer
    x = 16,448.54

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Half scale
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Double scale
Find fourth proportional to 18,296.16, 25,244.70 and 11,922.12
Similar ratio
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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.