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Finding the Fourth Proportional to 17,838.81, 26,758.47 and 8,479.79

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Solution

The fourth proportional to 17,838.81, 26,758.47 and 8,479.79 is: 12,719.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,838.81 : 26,758.47 = 8,479.79 : x
  2. Step 2: Convert to fraction form
    17,838.81/26,758.47 = 8,479.79/x
  3. Step 3: Cross multiply
    17,838.81x = 26,758.47 × 8,479.79
  4. Step 4: Simplify right side
    17,838.81x = 226,906,204.67
  5. Step 5: Solve for x
    x = 226,906,204.67/17,838.81
  6. Step 6: Final answer
    x = 12,719.81

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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.