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Finding the Fourth Proportional to 19,863.96, 29,799.84 and 6,720.12

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Solution

The fourth proportional to 19,863.96, 29,799.84 and 6,720.12 is: 10,081.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,863.96 : 29,799.84 = 6,720.12 : x
  2. Step 2: Convert to fraction form
    19,863.96/29,799.84 = 6,720.12/x
  3. Step 3: Cross multiply
    19,863.96x = 29,799.84 × 6,720.12
  4. Step 4: Simplify right side
    19,863.96x = 200,258,500.78
  5. Step 5: Solve for x
    x = 200,258,500.78/19,863.96
  6. Step 6: Final answer
    x = 10,081.50

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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.