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Finding the Fourth Proportional to 57,873.98, 86,817.20 and 18,421.86

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Solution

The fourth proportional to 57,873.98, 86,817.20 and 18,421.86 is: 27,634.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,873.98 : 86,817.20 = 18,421.86 : x
  2. Step 2: Convert to fraction form
    57,873.98/86,817.20 = 18,421.86/x
  3. Step 3: Cross multiply
    57,873.98x = 86,817.20 × 18,421.86
  4. Step 4: Simplify right side
    57,873.98x = 1,599,334,211.88
  5. Step 5: Solve for x
    x = 1,599,334,211.88/57,873.98
  6. Step 6: Final answer
    x = 27,634.77

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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.