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Finding the Fourth Proportional to 57,861.12, 86,808.32 and 18,424.32

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Solution

The fourth proportional to 57,861.12, 86,808.32 and 18,424.32 is: 27,641.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,861.12 : 86,808.32 = 18,424.32 : x
  2. Step 2: Convert to fraction form
    57,861.12/86,808.32 = 18,424.32/x
  3. Step 3: Cross multiply
    57,861.12x = 86,808.32 × 18,424.32
  4. Step 4: Simplify right side
    57,861.12x = 1,599,384,266.34
  5. Step 5: Solve for x
    x = 1,599,384,266.34/57,861.12
  6. Step 6: Final answer
    x = 27,641.78

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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.