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Finding the Fourth Proportional to 14,979.10, 20,665.11 and 9,309.82

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Solution

The fourth proportional to 14,979.10, 20,665.11 and 9,309.82 is: 12,843.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,979.10 : 20,665.11 = 9,309.82 : x
  2. Step 2: Convert to fraction form
    14,979.10/20,665.11 = 9,309.82/x
  3. Step 3: Cross multiply
    14,979.10x = 20,665.11 × 9,309.82
  4. Step 4: Simplify right side
    14,979.10x = 192,388,454.38
  5. Step 5: Solve for x
    x = 192,388,454.38/14,979.10
  6. Step 6: Final answer
    x = 12,843.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.