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Finding the Fourth Proportional to 13,305.92, 18,358.16 and 7,998.80

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Solution

The fourth proportional to 13,305.92, 18,358.16 and 7,998.80 is: 11,035.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,305.92 : 18,358.16 = 7,998.80 : x
  2. Step 2: Convert to fraction form
    13,305.92/18,358.16 = 7,998.80/x
  3. Step 3: Cross multiply
    13,305.92x = 18,358.16 × 7,998.80
  4. Step 4: Simplify right side
    13,305.92x = 146,843,250.21
  5. Step 5: Solve for x
    x = 146,843,250.21/13,305.92
  6. Step 6: Final answer
    x = 11,035.93

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.