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Finding the Fourth Proportional to 40,362.78, 60,553.89 and 12,660.78

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Solution

The fourth proportional to 40,362.78, 60,553.89 and 12,660.78 is: 18,994.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,362.78 : 60,553.89 = 12,660.78 : x
  2. Step 2: Convert to fraction form
    40,362.78/60,553.89 = 12,660.78/x
  3. Step 3: Cross multiply
    40,362.78x = 60,553.89 × 12,660.78
  4. Step 4: Simplify right side
    40,362.78x = 766,659,479.43
  5. Step 5: Solve for x
    x = 766,659,479.43/40,362.78
  6. Step 6: Final answer
    x = 18,994.22

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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.