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Finding the Fourth Proportional to 12,620.71, 18,934.71 and 5,223.79

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Solution

The fourth proportional to 12,620.71, 18,934.71 and 5,223.79 is: 7,837.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,620.71 : 18,934.71 = 5,223.79 : x
  2. Step 2: Convert to fraction form
    12,620.71/18,934.71 = 5,223.79/x
  3. Step 3: Cross multiply
    12,620.71x = 18,934.71 × 5,223.79
  4. Step 4: Simplify right side
    12,620.71x = 98,910,948.75
  5. Step 5: Solve for x
    x = 98,910,948.75/12,620.71
  6. Step 6: Final answer
    x = 7,837.19

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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.