Home / 20,142.40-30,218.80-7,662.64

Finding the Fourth Proportional to 20,142.40, 30,218.80 and 7,662.64

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Solution

The fourth proportional to 20,142.40, 30,218.80 and 7,662.64 is: 11,495.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,142.40 : 30,218.80 = 7,662.64 : x
  2. Step 2: Convert to fraction form
    20,142.40/30,218.80 = 7,662.64/x
  3. Step 3: Cross multiply
    20,142.40x = 30,218.80 × 7,662.64
  4. Step 4: Simplify right side
    20,142.40x = 231,555,785.63
  5. Step 5: Solve for x
    x = 231,555,785.63/20,142.40
  6. Step 6: Final answer
    x = 11,495.94

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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.