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Finding the Fourth Proportional to 13,959.62, 20,939.43 and 4,098.83

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Solution

The fourth proportional to 13,959.62, 20,939.43 and 4,098.83 is: 6,148.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,959.62 : 20,939.43 = 4,098.83 : x
  2. Step 2: Convert to fraction form
    13,959.62/20,939.43 = 4,098.83/x
  3. Step 3: Cross multiply
    13,959.62x = 20,939.43 × 4,098.83
  4. Step 4: Simplify right side
    13,959.62x = 85,827,163.87
  5. Step 5: Solve for x
    x = 85,827,163.87/13,959.62
  6. Step 6: Final answer
    x = 6,148.25

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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.