Home / 20,319.20-30,479.60-7,169.68

Finding the Fourth Proportional to 20,319.20, 30,479.60 and 7,169.68

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Solution

The fourth proportional to 20,319.20, 30,479.60 and 7,169.68 is: 10,754.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,319.20 : 30,479.60 = 7,169.68 : x
  2. Step 2: Convert to fraction form
    20,319.20/30,479.60 = 7,169.68/x
  3. Step 3: Cross multiply
    20,319.20x = 30,479.60 × 7,169.68
  4. Step 4: Simplify right side
    20,319.20x = 218,528,978.53
  5. Step 5: Solve for x
    x = 218,528,978.53/20,319.20
  6. Step 6: Final answer
    x = 10,754.80

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.