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Finding the Fourth Proportional to 19,309.72, 28,965.08 and 6,162.08

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Solution

The fourth proportional to 19,309.72, 28,965.08 and 6,162.08 is: 9,243.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,309.72 : 28,965.08 = 6,162.08 : x
  2. Step 2: Convert to fraction form
    19,309.72/28,965.08 = 6,162.08/x
  3. Step 3: Cross multiply
    19,309.72x = 28,965.08 × 6,162.08
  4. Step 4: Simplify right side
    19,309.72x = 178,485,037.90
  5. Step 5: Solve for x
    x = 178,485,037.90/19,309.72
  6. Step 6: Final answer
    x = 9,243.28

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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.