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Finding the Fourth Proportional to 18,805.72, 28,208.58 and 9,578.20

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Solution

The fourth proportional to 18,805.72, 28,208.58 and 9,578.20 is: 14,367.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,805.72 : 28,208.58 = 9,578.20 : x
  2. Step 2: Convert to fraction form
    18,805.72/28,208.58 = 9,578.20/x
  3. Step 3: Cross multiply
    18,805.72x = 28,208.58 × 9,578.20
  4. Step 4: Simplify right side
    18,805.72x = 270,187,420.96
  5. Step 5: Solve for x
    x = 270,187,420.96/18,805.72
  6. Step 6: Final answer
    x = 14,367.30

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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.