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Finding the Fourth Proportional to 38,157.75, 52,657.70 and 21,390.75

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Solution

The fourth proportional to 38,157.75, 52,657.70 and 21,390.75 is: 29,519.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,157.75 : 52,657.70 = 21,390.75 : x
  2. Step 2: Convert to fraction form
    38,157.75/52,657.70 = 21,390.75/x
  3. Step 3: Cross multiply
    38,157.75x = 52,657.70 × 21,390.75
  4. Step 4: Simplify right side
    38,157.75x = 1,126,387,589.32
  5. Step 5: Solve for x
    x = 1,126,387,589.32/38,157.75
  6. Step 6: Final answer
    x = 29,519.24

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.