Home / 12,640.40-18,945.22-8,943.69

Finding the Fourth Proportional to 12,640.40, 18,945.22 and 8,943.69

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Solution

The fourth proportional to 12,640.40, 18,945.22 and 8,943.69 is: 13,404.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,640.40 : 18,945.22 = 8,943.69 : x
  2. Step 2: Convert to fraction form
    12,640.40/18,945.22 = 8,943.69/x
  3. Step 3: Cross multiply
    12,640.40x = 18,945.22 × 8,943.69
  4. Step 4: Simplify right side
    12,640.40x = 169,440,174.66
  5. Step 5: Solve for x
    x = 169,440,174.66/12,640.40
  6. Step 6: Final answer
    x = 13,404.65

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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.