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Finding the Fourth Proportional to 18,439.82, 27,659.73 and 7,902.99

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Solution

The fourth proportional to 18,439.82, 27,659.73 and 7,902.99 is: 11,854.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,439.82 : 27,659.73 = 7,902.99 : x
  2. Step 2: Convert to fraction form
    18,439.82/27,659.73 = 7,902.99/x
  3. Step 3: Cross multiply
    18,439.82x = 27,659.73 × 7,902.99
  4. Step 4: Simplify right side
    18,439.82x = 218,594,569.59
  5. Step 5: Solve for x
    x = 218,594,569.59/18,439.82
  6. Step 6: Final answer
    x = 11,854.49

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.