Home / 13,789.86-20,681.67-3,928.92

Finding the Fourth Proportional to 13,789.86, 20,681.67 and 3,928.92

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Solution

The fourth proportional to 13,789.86, 20,681.67 and 3,928.92 is: 5,892.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,789.86 : 20,681.67 = 3,928.92 : x
  2. Step 2: Convert to fraction form
    13,789.86/20,681.67 = 3,928.92/x
  3. Step 3: Cross multiply
    13,789.86x = 20,681.67 × 3,928.92
  4. Step 4: Simplify right side
    13,789.86x = 81,256,626.90
  5. Step 5: Solve for x
    x = 81,256,626.90/13,789.86
  6. Step 6: Final answer
    x = 5,892.49

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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.