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Finding the Fourth Proportional to 18,995.56, 28,496.58 and 8,469.40

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Solution

The fourth proportional to 18,995.56, 28,496.58 and 8,469.40 is: 12,705.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,995.56 : 28,496.58 = 8,469.40 : x
  2. Step 2: Convert to fraction form
    18,995.56/28,496.58 = 8,469.40/x
  3. Step 3: Cross multiply
    18,995.56x = 28,496.58 × 8,469.40
  4. Step 4: Simplify right side
    18,995.56x = 241,348,934.65
  5. Step 5: Solve for x
    x = 241,348,934.65/18,995.56
  6. Step 6: Final answer
    x = 12,705.54

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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.