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Finding the Fourth Proportional to 20,577.84, 30,879.36 and 8,890.80

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Solution

The fourth proportional to 20,577.84, 30,879.36 and 8,890.80 is: 13,341.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,577.84 : 30,879.36 = 8,890.80 : x
  2. Step 2: Convert to fraction form
    20,577.84/30,879.36 = 8,890.80/x
  3. Step 3: Cross multiply
    20,577.84x = 30,879.36 × 8,890.80
  4. Step 4: Simplify right side
    20,577.84x = 274,542,213.89
  5. Step 5: Solve for x
    x = 274,542,213.89/20,577.84
  6. Step 6: Final answer
    x = 13,341.64

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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.