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Finding the Fourth Proportional to 39,657.64, 54,729.08 and 21,753.40

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Solution

The fourth proportional to 39,657.64, 54,729.08 and 21,753.40 is: 30,020.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,657.64 : 54,729.08 = 21,753.40 : x
  2. Step 2: Convert to fraction form
    39,657.64/54,729.08 = 21,753.40/x
  3. Step 3: Cross multiply
    39,657.64x = 54,729.08 × 21,753.40
  4. Step 4: Simplify right side
    39,657.64x = 1,190,543,568.87
  5. Step 5: Solve for x
    x = 1,190,543,568.87/39,657.64
  6. Step 6: Final answer
    x = 30,020.53

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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.