Home / 20,281.20-30,405.60-8,584.80

Finding the Fourth Proportional to 20,281.20, 30,405.60 and 8,584.80

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Solution

The fourth proportional to 20,281.20, 30,405.60 and 8,584.80 is: 12,870.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,281.20 : 30,405.60 = 8,584.80 : x
  2. Step 2: Convert to fraction form
    20,281.20/30,405.60 = 8,584.80/x
  3. Step 3: Cross multiply
    20,281.20x = 30,405.60 × 8,584.80
  4. Step 4: Simplify right side
    20,281.20x = 261,025,994.88
  5. Step 5: Solve for x
    x = 261,025,994.88/20,281.20
  6. Step 6: Final answer
    x = 12,870.34

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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.