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Finding the Fourth Proportional to 18,797.84, 28,191.72 and 5,647.28

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Solution

The fourth proportional to 18,797.84, 28,191.72 and 5,647.28 is: 8,469.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,797.84 : 28,191.72 = 5,647.28 : x
  2. Step 2: Convert to fraction form
    18,797.84/28,191.72 = 5,647.28/x
  3. Step 3: Cross multiply
    18,797.84x = 28,191.72 × 5,647.28
  4. Step 4: Simplify right side
    18,797.84x = 159,206,536.52
  5. Step 5: Solve for x
    x = 159,206,536.52/18,797.84
  6. Step 6: Final answer
    x = 8,469.41

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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.