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Finding the Fourth Proportional to 57,921.70, 86,864.04 and 18,469.57

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Solution

The fourth proportional to 57,921.70, 86,864.04 and 18,469.57 is: 27,698.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,921.70 : 86,864.04 = 18,469.57 : x
  2. Step 2: Convert to fraction form
    57,921.70/86,864.04 = 18,469.57/x
  3. Step 3: Cross multiply
    57,921.70x = 86,864.04 × 18,469.57
  4. Step 4: Simplify right side
    57,921.70x = 1,604,341,467.26
  5. Step 5: Solve for x
    x = 1,604,341,467.26/57,921.70
  6. Step 6: Final answer
    x = 27,698.45

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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.