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Finding the Fourth Proportional to 43,892.80, 65,860.16 and 20,515.84

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Solution

The fourth proportional to 43,892.80, 65,860.16 and 20,515.84 is: 30,783.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,892.80 : 65,860.16 = 20,515.84 : x
  2. Step 2: Convert to fraction form
    43,892.80/65,860.16 = 20,515.84/x
  3. Step 3: Cross multiply
    43,892.80x = 65,860.16 × 20,515.84
  4. Step 4: Simplify right side
    43,892.80x = 1,351,176,504.93
  5. Step 5: Solve for x
    x = 1,351,176,504.93/43,892.80
  6. Step 6: Final answer
    x = 30,783.56

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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.