Home / 20,199.70-30,299.55-7,887.70

Finding the Fourth Proportional to 20,199.70, 30,299.55 and 7,887.70

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Solution

The fourth proportional to 20,199.70, 30,299.55 and 7,887.70 is: 11,831.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,199.70 : 30,299.55 = 7,887.70 : x
  2. Step 2: Convert to fraction form
    20,199.70/30,299.55 = 7,887.70/x
  3. Step 3: Cross multiply
    20,199.70x = 30,299.55 × 7,887.70
  4. Step 4: Simplify right side
    20,199.70x = 238,993,760.54
  5. Step 5: Solve for x
    x = 238,993,760.54/20,199.70
  6. Step 6: Final answer
    x = 11,831.55

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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.