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Finding the Fourth Proportional to 20,567.20, 30,865.20 and 8,888.80

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Solution

The fourth proportional to 20,567.20, 30,865.20 and 8,888.80 is: 13,339.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,567.20 : 30,865.20 = 8,888.80 : x
  2. Step 2: Convert to fraction form
    20,567.20/30,865.20 = 8,888.80/x
  3. Step 3: Cross multiply
    20,567.20x = 30,865.20 × 8,888.80
  4. Step 4: Simplify right side
    20,567.20x = 274,354,589.76
  5. Step 5: Solve for x
    x = 274,354,589.76/20,567.20
  6. Step 6: Final answer
    x = 13,339.42

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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.