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Finding the Fourth Proportional to 20,561.67, 30,843.32 and 8,866.89

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Solution

The fourth proportional to 20,561.67, 30,843.32 and 8,866.89 is: 13,300.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,561.67 : 30,843.32 = 8,866.89 : x
  2. Step 2: Convert to fraction form
    20,561.67/30,843.32 = 8,866.89/x
  3. Step 3: Cross multiply
    20,561.67x = 30,843.32 × 8,866.89
  4. Step 4: Simplify right side
    20,561.67x = 273,484,281.34
  5. Step 5: Solve for x
    x = 273,484,281.34/20,561.67
  6. Step 6: Final answer
    x = 13,300.68

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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.