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Finding the Fourth Proportional to 13,891.50, 20,811.07 and 6,863.28

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Solution

The fourth proportional to 13,891.50, 20,811.07 and 6,863.28 is: 10,281.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,891.50 : 20,811.07 = 6,863.28 : x
  2. Step 2: Convert to fraction form
    13,891.50/20,811.07 = 6,863.28/x
  3. Step 3: Cross multiply
    13,891.50x = 20,811.07 × 6,863.28
  4. Step 4: Simplify right side
    13,891.50x = 142,832,062.14
  5. Step 5: Solve for x
    x = 142,832,062.14/13,891.50
  6. Step 6: Final answer
    x = 10,281.98

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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.