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Finding the Fourth Proportional to 57,873.42, 86,816.50 and 18,421.30

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Solution

The fourth proportional to 57,873.42, 86,816.50 and 18,421.30 is: 27,633.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,873.42 : 86,816.50 = 18,421.30 : x
  2. Step 2: Convert to fraction form
    57,873.42/86,816.50 = 18,421.30/x
  3. Step 3: Cross multiply
    57,873.42x = 86,816.50 × 18,421.30
  4. Step 4: Simplify right side
    57,873.42x = 1,599,272,791.45
  5. Step 5: Solve for x
    x = 1,599,272,791.45/57,873.42
  6. Step 6: Final answer
    x = 27,633.98

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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.