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Finding the Fourth Proportional to 18,908.64, 26,066.88 and 13,863.96

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Solution

The fourth proportional to 18,908.64, 26,066.88 and 13,863.96 is: 19,112.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,908.64 : 26,066.88 = 13,863.96 : x
  2. Step 2: Convert to fraction form
    18,908.64/26,066.88 = 13,863.96/x
  3. Step 3: Cross multiply
    18,908.64x = 26,066.88 × 13,863.96
  4. Step 4: Simplify right side
    18,908.64x = 361,390,181.64
  5. Step 5: Solve for x
    x = 361,390,181.64/18,908.64
  6. Step 6: Final answer
    x = 19,112.44

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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.