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Finding the Fourth Proportional to 57,863.74, 86,796.33 and 18,420.70

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Solution

The fourth proportional to 57,863.74, 86,796.33 and 18,420.70 is: 27,631.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,863.74 : 86,796.33 = 18,420.70 : x
  2. Step 2: Convert to fraction form
    57,863.74/86,796.33 = 18,420.70/x
  3. Step 3: Cross multiply
    57,863.74x = 86,796.33 × 18,420.70
  4. Step 4: Simplify right side
    57,863.74x = 1,598,849,156.03
  5. Step 5: Solve for x
    x = 1,598,849,156.03/57,863.74
  6. Step 6: Final answer
    x = 27,631.28

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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.