Home / 20,129.09-30,183.93-8,439.17

Finding the Fourth Proportional to 20,129.09, 30,183.93 and 8,439.17

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Solution

The fourth proportional to 20,129.09, 30,183.93 and 8,439.17 is: 12,654.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,129.09 : 30,183.93 = 8,439.17 : x
  2. Step 2: Convert to fraction form
    20,129.09/30,183.93 = 8,439.17/x
  3. Step 3: Cross multiply
    20,129.09x = 30,183.93 × 8,439.17
  4. Step 4: Simplify right side
    20,129.09x = 254,727,316.54
  5. Step 5: Solve for x
    x = 254,727,316.54/20,129.09
  6. Step 6: Final answer
    x = 12,654.69

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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.