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Finding the Fourth Proportional to 65,960.87, 98,931.74 and 21,589.38

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Solution

The fourth proportional to 65,960.87, 98,931.74 and 21,589.38 is: 32,380.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,960.87 : 98,931.74 = 21,589.38 : x
  2. Step 2: Convert to fraction form
    65,960.87/98,931.74 = 21,589.38/x
  3. Step 3: Cross multiply
    65,960.87x = 98,931.74 × 21,589.38
  4. Step 4: Simplify right side
    65,960.87x = 2,135,874,820.97
  5. Step 5: Solve for x
    x = 2,135,874,820.97/65,960.87
  6. Step 6: Final answer
    x = 32,380.94

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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.