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Finding the Fourth Proportional to 18,853.92, 28,233.12 and 11,352.80

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Solution

The fourth proportional to 18,853.92, 28,233.12 and 11,352.80 is: 17,000.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,853.92 : 28,233.12 = 11,352.80 : x
  2. Step 2: Convert to fraction form
    18,853.92/28,233.12 = 11,352.80/x
  3. Step 3: Cross multiply
    18,853.92x = 28,233.12 × 11,352.80
  4. Step 4: Simplify right side
    18,853.92x = 320,524,964.74
  5. Step 5: Solve for x
    x = 320,524,964.74/18,853.92
  6. Step 6: Final answer
    x = 17,000.44

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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.