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Finding the Fourth Proportional to 18,751.45, 28,118.49 and 6,902.23

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Solution

The fourth proportional to 18,751.45, 28,118.49 and 6,902.23 is: 10,350.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,751.45 : 28,118.49 = 6,902.23 : x
  2. Step 2: Convert to fraction form
    18,751.45/28,118.49 = 6,902.23/x
  3. Step 3: Cross multiply
    18,751.45x = 28,118.49 × 6,902.23
  4. Step 4: Simplify right side
    18,751.45x = 194,080,285.23
  5. Step 5: Solve for x
    x = 194,080,285.23/18,751.45
  6. Step 6: Final answer
    x = 10,350.15

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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.