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Finding the Fourth Proportional to 39,861.59, 59,680.60 and 21,099.22

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Solution

The fourth proportional to 39,861.59, 59,680.60 and 21,099.22 is: 31,589.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,861.59 : 59,680.60 = 21,099.22 : x
  2. Step 2: Convert to fraction form
    39,861.59/59,680.60 = 21,099.22/x
  3. Step 3: Cross multiply
    39,861.59x = 59,680.60 × 21,099.22
  4. Step 4: Simplify right side
    39,861.59x = 1,259,213,907.18
  5. Step 5: Solve for x
    x = 1,259,213,907.18/39,861.59
  6. Step 6: Final answer
    x = 31,589.66

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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.