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Finding the Fourth Proportional to 20,616, 30,929.28 and 6,765.12

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Solution

The fourth proportional to 20,616, 30,929.28 and 6,765.12 is: 10,149.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,616 : 30,929.28 = 6,765.12 : x
  2. Step 2: Convert to fraction form
    20,616/30,929.28 = 6,765.12/x
  3. Step 3: Cross multiply
    20,616x = 30,929.28 × 6,765.12
  4. Step 4: Simplify right side
    20,616x = 209,240,290.71
  5. Step 5: Solve for x
    x = 209,240,290.71/20,616
  6. Step 6: Final answer
    x = 10,149.41

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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.