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Finding the Fourth Proportional to 18,308.32, 27,455.96 and 7,914.40

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Solution

The fourth proportional to 18,308.32, 27,455.96 and 7,914.40 is: 11,868.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,308.32 : 27,455.96 = 7,914.40 : x
  2. Step 2: Convert to fraction form
    18,308.32/27,455.96 = 7,914.40/x
  3. Step 3: Cross multiply
    18,308.32x = 27,455.96 × 7,914.40
  4. Step 4: Simplify right side
    18,308.32x = 217,297,449.82
  5. Step 5: Solve for x
    x = 217,297,449.82/18,308.32
  6. Step 6: Final answer
    x = 11,868.78

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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.