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Finding the Fourth Proportional to 40,360.78, 60,550.89 and 12,658.78

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Solution

The fourth proportional to 40,360.78, 60,550.89 and 12,658.78 is: 18,991.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,360.78 : 60,550.89 = 12,658.78 : x
  2. Step 2: Convert to fraction form
    40,360.78/60,550.89 = 12,658.78/x
  3. Step 3: Cross multiply
    40,360.78x = 60,550.89 × 12,658.78
  4. Step 4: Simplify right side
    40,360.78x = 766,500,494.74
  5. Step 5: Solve for x
    x = 766,500,494.74/40,360.78
  6. Step 6: Final answer
    x = 18,991.22

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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.