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Finding the Fourth Proportional to 18,930, 26,105.68 and 14,960.60

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Solution

The fourth proportional to 18,930, 26,105.68 and 14,960.60 is: 20,631.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,930 : 26,105.68 = 14,960.60 : x
  2. Step 2: Convert to fraction form
    18,930/26,105.68 = 14,960.60/x
  3. Step 3: Cross multiply
    18,930x = 26,105.68 × 14,960.60
  4. Step 4: Simplify right side
    18,930x = 390,556,636.21
  5. Step 5: Solve for x
    x = 390,556,636.21/18,930
  6. Step 6: Final answer
    x = 20,631.62

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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.