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Finding the Fourth Proportional to 20,468.78, 30,703.16 and 5,677.69

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Solution

The fourth proportional to 20,468.78, 30,703.16 and 5,677.69 is: 8,516.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,468.78 : 30,703.16 = 5,677.69 : x
  2. Step 2: Convert to fraction form
    20,468.78/30,703.16 = 5,677.69/x
  3. Step 3: Cross multiply
    20,468.78x = 30,703.16 × 5,677.69
  4. Step 4: Simplify right side
    20,468.78x = 174,323,120.60
  5. Step 5: Solve for x
    x = 174,323,120.60/20,468.78
  6. Step 6: Final answer
    x = 8,516.54

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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.