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Finding the Fourth Proportional to 18,382.64, 25,369.08 and 9,998.96

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Solution

The fourth proportional to 18,382.64, 25,369.08 and 9,998.96 is: 13,799.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,382.64 : 25,369.08 = 9,998.96 : x
  2. Step 2: Convert to fraction form
    18,382.64/25,369.08 = 9,998.96/x
  3. Step 3: Cross multiply
    18,382.64x = 25,369.08 × 9,998.96
  4. Step 4: Simplify right side
    18,382.64x = 253,664,416.16
  5. Step 5: Solve for x
    x = 253,664,416.16/18,382.64
  6. Step 6: Final answer
    x = 13,799.13

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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.