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Finding the Fourth Proportional to 26,581.28, 39,871.98 and 7,861.64

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Solution

The fourth proportional to 26,581.28, 39,871.98 and 7,861.64 is: 11,792.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,581.28 : 39,871.98 = 7,861.64 : x
  2. Step 2: Convert to fraction form
    26,581.28/39,871.98 = 7,861.64/x
  3. Step 3: Cross multiply
    26,581.28x = 39,871.98 × 7,861.64
  4. Step 4: Simplify right side
    26,581.28x = 313,458,953.49
  5. Step 5: Solve for x
    x = 313,458,953.49/26,581.28
  6. Step 6: Final answer
    x = 11,792.47

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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.