Home / 13,938.48-20,908.36-4,078.61

Finding the Fourth Proportional to 13,938.48, 20,908.36 and 4,078.61

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Solution

The fourth proportional to 13,938.48, 20,908.36 and 4,078.61 is: 6,118.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,938.48 : 20,908.36 = 4,078.61 : x
  2. Step 2: Convert to fraction form
    13,938.48/20,908.36 = 4,078.61/x
  3. Step 3: Cross multiply
    13,938.48x = 20,908.36 × 4,078.61
  4. Step 4: Simplify right side
    13,938.48x = 85,277,046.18
  5. Step 5: Solve for x
    x = 85,277,046.18/13,938.48
  6. Step 6: Final answer
    x = 6,118.10

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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.