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Finding the Fourth Proportional to 20,482.60, 30,731.10 and 8,799.40

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Solution

The fourth proportional to 20,482.60, 30,731.10 and 8,799.40 is: 13,202.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,482.60 : 30,731.10 = 8,799.40 : x
  2. Step 2: Convert to fraction form
    20,482.60/30,731.10 = 8,799.40/x
  3. Step 3: Cross multiply
    20,482.60x = 30,731.10 × 8,799.40
  4. Step 4: Simplify right side
    20,482.60x = 270,415,241.34
  5. Step 5: Solve for x
    x = 270,415,241.34/20,482.60
  6. Step 6: Final answer
    x = 13,202.19

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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.