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Finding the Fourth Proportional to 20,407.77, 30,608.12 and 5,613.17

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Solution

The fourth proportional to 20,407.77, 30,608.12 and 5,613.17 is: 8,418.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,407.77 : 30,608.12 = 5,613.17 : x
  2. Step 2: Convert to fraction form
    20,407.77/30,608.12 = 5,613.17/x
  3. Step 3: Cross multiply
    20,407.77x = 30,608.12 × 5,613.17
  4. Step 4: Simplify right side
    20,407.77x = 171,808,441.93
  5. Step 5: Solve for x
    x = 171,808,441.93/20,407.77
  6. Step 6: Final answer
    x = 8,418.78

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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.