Home / 20,129.81-30,184.46-7,640.33

Finding the Fourth Proportional to 20,129.81, 30,184.46 and 7,640.33

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Solution

The fourth proportional to 20,129.81, 30,184.46 and 7,640.33 is: 11,456.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,129.81 : 30,184.46 = 7,640.33 : x
  2. Step 2: Convert to fraction form
    20,129.81/30,184.46 = 7,640.33/x
  3. Step 3: Cross multiply
    20,129.81x = 30,184.46 × 7,640.33
  4. Step 4: Simplify right side
    20,129.81x = 230,619,046.15
  5. Step 5: Solve for x
    x = 230,619,046.15/20,129.81
  6. Step 6: Final answer
    x = 11,456.60

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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.