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Finding the Fourth Proportional to 20,613.96, 30,920.94 and 7,463.28

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Solution

The fourth proportional to 20,613.96, 30,920.94 and 7,463.28 is: 11,194.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,613.96 : 30,920.94 = 7,463.28 : x
  2. Step 2: Convert to fraction form
    20,613.96/30,920.94 = 7,463.28/x
  3. Step 3: Cross multiply
    20,613.96x = 30,920.94 × 7,463.28
  4. Step 4: Simplify right side
    20,613.96x = 230,771,633.08
  5. Step 5: Solve for x
    x = 230,771,633.08/20,613.96
  6. Step 6: Final answer
    x = 11,194.92

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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.