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Finding the Fourth Proportional to 18,967.94, 28,435.84 and 7,867.70

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Solution

The fourth proportional to 18,967.94, 28,435.84 and 7,867.70 is: 11,794.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,967.94 : 28,435.84 = 7,867.70 : x
  2. Step 2: Convert to fraction form
    18,967.94/28,435.84 = 7,867.70/x
  3. Step 3: Cross multiply
    18,967.94x = 28,435.84 × 7,867.70
  4. Step 4: Simplify right side
    18,967.94x = 223,724,476.85
  5. Step 5: Solve for x
    x = 223,724,476.85/18,967.94
  6. Step 6: Final answer
    x = 11,794.88

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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.