Home / 13,939.89-20,893.92-5,614.57

Finding the Fourth Proportional to 13,939.89, 20,893.92 and 5,614.57

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Solution

The fourth proportional to 13,939.89, 20,893.92 and 5,614.57 is: 8,415.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,939.89 : 20,893.92 = 5,614.57 : x
  2. Step 2: Convert to fraction form
    13,939.89/20,893.92 = 5,614.57/x
  3. Step 3: Cross multiply
    13,939.89x = 20,893.92 × 5,614.57
  4. Step 4: Simplify right side
    13,939.89x = 117,310,376.41
  5. Step 5: Solve for x
    x = 117,310,376.41/13,939.89
  6. Step 6: Final answer
    x = 8,415.44

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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.