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Finding the Fourth Proportional to 40,622.70, 60,912.18 and 21,912.78

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Solution

The fourth proportional to 40,622.70, 60,912.18 and 21,912.78 is: 32,857.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,622.70 : 60,912.18 = 21,912.78 : x
  2. Step 2: Convert to fraction form
    40,622.70/60,912.18 = 21,912.78/x
  3. Step 3: Cross multiply
    40,622.70x = 60,912.18 × 21,912.78
  4. Step 4: Simplify right side
    40,622.70x = 1,334,755,199.66
  5. Step 5: Solve for x
    x = 1,334,755,199.66/40,622.70
  6. Step 6: Final answer
    x = 32,857.37

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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.