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Finding the Fourth Proportional to 14,713.65, 21,976.92 and 12,639.65

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Solution

The fourth proportional to 14,713.65, 21,976.92 and 12,639.65 is: 18,879.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,713.65 : 21,976.92 = 12,639.65 : x
  2. Step 2: Convert to fraction form
    14,713.65/21,976.92 = 12,639.65/x
  3. Step 3: Cross multiply
    14,713.65x = 21,976.92 × 12,639.65
  4. Step 4: Simplify right side
    14,713.65x = 277,780,466.99
  5. Step 5: Solve for x
    x = 277,780,466.99/14,713.65
  6. Step 6: Final answer
    x = 18,879.10

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.