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Finding the Fourth Proportional to 20,656, 30,984 and 6,806.08

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Solution

The fourth proportional to 20,656, 30,984 and 6,806.08 is: 10,209.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,656 : 30,984 = 6,806.08 : x
  2. Step 2: Convert to fraction form
    20,656/30,984 = 6,806.08/x
  3. Step 3: Cross multiply
    20,656x = 30,984 × 6,806.08
  4. Step 4: Simplify right side
    20,656x = 210,879,582.72
  5. Step 5: Solve for x
    x = 210,879,582.72/20,656
  6. Step 6: Final answer
    x = 10,209.12

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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.