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Finding the Fourth Proportional to 6,613.50, 9,920.65 and 1,996.54

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Solution

The fourth proportional to 6,613.50, 9,920.65 and 1,996.54 is: 2,994.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,613.50 : 9,920.65 = 1,996.54 : x
  2. Step 2: Convert to fraction form
    6,613.50/9,920.65 = 1,996.54/x
  3. Step 3: Cross multiply
    6,613.50x = 9,920.65 × 1,996.54
  4. Step 4: Simplify right side
    6,613.50x = 19,806,974.55
  5. Step 5: Solve for x
    x = 19,806,974.55/6,613.50
  6. Step 6: Final answer
    x = 2,994.93

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1.5x scale

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.