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Finding the Fourth Proportional to 18,696.40, 28,027.28 and 9,809.89

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Solution

The fourth proportional to 18,696.40, 28,027.28 and 9,809.89 is: 14,705.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,696.40 : 28,027.28 = 9,809.89 : x
  2. Step 2: Convert to fraction form
    18,696.40/28,027.28 = 9,809.89/x
  3. Step 3: Cross multiply
    18,696.40x = 28,027.28 × 9,809.89
  4. Step 4: Simplify right side
    18,696.40x = 274,944,488.26
  5. Step 5: Solve for x
    x = 274,944,488.26/18,696.40
  6. Step 6: Final answer
    x = 14,705.75

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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.