Home / 13,615.12-20,387.62-8,072.38

Finding the Fourth Proportional to 13,615.12, 20,387.62 and 8,072.38

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Solution

The fourth proportional to 13,615.12, 20,387.62 and 8,072.38 is: 12,087.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,615.12 : 20,387.62 = 8,072.38 : x
  2. Step 2: Convert to fraction form
    13,615.12/20,387.62 = 8,072.38/x
  3. Step 3: Cross multiply
    13,615.12x = 20,387.62 × 8,072.38
  4. Step 4: Simplify right side
    13,615.12x = 164,576,615.94
  5. Step 5: Solve for x
    x = 164,576,615.94/13,615.12
  6. Step 6: Final answer
    x = 12,087.78

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1.5x scale

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.