Home / 20,142.70-30,203.67-9,039.87

Finding the Fourth Proportional to 20,142.70, 30,203.67 and 9,039.87

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Solution

The fourth proportional to 20,142.70, 30,203.67 and 9,039.87 is: 13,555.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,142.70 : 30,203.67 = 9,039.87 : x
  2. Step 2: Convert to fraction form
    20,142.70/30,203.67 = 9,039.87/x
  3. Step 3: Cross multiply
    20,142.70x = 30,203.67 × 9,039.87
  4. Step 4: Simplify right side
    20,142.70x = 273,037,076.70
  5. Step 5: Solve for x
    x = 273,037,076.70/20,142.70
  6. Step 6: Final answer
    x = 13,555.14

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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.