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Finding the Fourth Proportional to 43,607.75, 65,421.38 and 15,905.75

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Solution

The fourth proportional to 43,607.75, 65,421.38 and 15,905.75 is: 23,862.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,607.75 : 65,421.38 = 15,905.75 : x
  2. Step 2: Convert to fraction form
    43,607.75/65,421.38 = 15,905.75/x
  3. Step 3: Cross multiply
    43,607.75x = 65,421.38 × 15,905.75
  4. Step 4: Simplify right side
    43,607.75x = 1,040,576,114.94
  5. Step 5: Solve for x
    x = 1,040,576,114.94/43,607.75
  6. Step 6: Final answer
    x = 23,862.18

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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.