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Finding the Fourth Proportional to 18,698.70, 28,049.49 and 5,551.03

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Solution

The fourth proportional to 18,698.70, 28,049.49 and 5,551.03 is: 8,326.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,698.70 : 28,049.49 = 5,551.03 : x
  2. Step 2: Convert to fraction form
    18,698.70/28,049.49 = 5,551.03/x
  3. Step 3: Cross multiply
    18,698.70x = 28,049.49 × 5,551.03
  4. Step 4: Simplify right side
    18,698.70x = 155,703,595.54
  5. Step 5: Solve for x
    x = 155,703,595.54/18,698.70
  6. Step 6: Final answer
    x = 8,326.98

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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.