Home / 13,687.11-20,569.01-8,141.31

Finding the Fourth Proportional to 13,687.11, 20,569.01 and 8,141.31

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Solution

The fourth proportional to 13,687.11, 20,569.01 and 8,141.31 is: 12,234.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,687.11 : 20,569.01 = 8,141.31 : x
  2. Step 2: Convert to fraction form
    13,687.11/20,569.01 = 8,141.31/x
  3. Step 3: Cross multiply
    13,687.11x = 20,569.01 × 8,141.31
  4. Step 4: Simplify right side
    13,687.11x = 167,458,646.10
  5. Step 5: Solve for x
    x = 167,458,646.10/13,687.11
  6. Step 6: Final answer
    x = 12,234.77

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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.