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Finding the Fourth Proportional to 38,563.40, 57,780.30 and 18,799.40

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Solution

The fourth proportional to 38,563.40, 57,780.30 and 18,799.40 is: 28,167.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,563.40 : 57,780.30 = 18,799.40 : x
  2. Step 2: Convert to fraction form
    38,563.40/57,780.30 = 18,799.40/x
  3. Step 3: Cross multiply
    38,563.40x = 57,780.30 × 18,799.40
  4. Step 4: Simplify right side
    38,563.40x = 1,086,234,971.82
  5. Step 5: Solve for x
    x = 1,086,234,971.82/38,563.40
  6. Step 6: Final answer
    x = 28,167.51

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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.