Home / 20,451.30-30,662.56-7,960.78

Finding the Fourth Proportional to 20,451.30, 30,662.56 and 7,960.78

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Solution

The fourth proportional to 20,451.30, 30,662.56 and 7,960.78 is: 11,935.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,451.30 : 30,662.56 = 7,960.78 : x
  2. Step 2: Convert to fraction form
    20,451.30/30,662.56 = 7,960.78/x
  3. Step 3: Cross multiply
    20,451.30x = 30,662.56 × 7,960.78
  4. Step 4: Simplify right side
    20,451.30x = 244,097,894.40
  5. Step 5: Solve for x
    x = 244,097,894.40/20,451.30
  6. Step 6: Final answer
    x = 11,935.57

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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.