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Finding the Fourth Proportional to 20,267.78, 30,401.70 and 7,955.78

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Solution

The fourth proportional to 20,267.78, 30,401.70 and 7,955.78 is: 11,933.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,267.78 : 30,401.70 = 7,955.78 : x
  2. Step 2: Convert to fraction form
    20,267.78/30,401.70 = 7,955.78/x
  3. Step 3: Cross multiply
    20,267.78x = 30,401.70 × 7,955.78
  4. Step 4: Simplify right side
    20,267.78x = 241,869,236.83
  5. Step 5: Solve for x
    x = 241,869,236.83/20,267.78
  6. Step 6: Final answer
    x = 11,933.68

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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.