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Finding the Fourth Proportional to 13,979.93, 20,963.73 and 7,404.57

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Solution

The fourth proportional to 13,979.93, 20,963.73 and 7,404.57 is: 11,103.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.93 : 20,963.73 = 7,404.57 : x
  2. Step 2: Convert to fraction form
    13,979.93/20,963.73 = 7,404.57/x
  3. Step 3: Cross multiply
    13,979.93x = 20,963.73 × 7,404.57
  4. Step 4: Simplify right side
    13,979.93x = 155,227,406.25
  5. Step 5: Solve for x
    x = 155,227,406.25/13,979.93
  6. Step 6: Final answer
    x = 11,103.59

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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.