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Finding the Fourth Proportional to 20,481.77, 30,722.65 and 11,710.54

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Solution

The fourth proportional to 20,481.77, 30,722.65 and 11,710.54 is: 17,565.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,481.77 : 30,722.65 = 11,710.54 : x
  2. Step 2: Convert to fraction form
    20,481.77/30,722.65 = 11,710.54/x
  3. Step 3: Cross multiply
    20,481.77x = 30,722.65 × 11,710.54
  4. Step 4: Simplify right side
    20,481.77x = 359,778,830.86
  5. Step 5: Solve for x
    x = 359,778,830.86/20,481.77
  6. Step 6: Final answer
    x = 17,565.81

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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.