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Finding the Fourth Proportional to 20,599.75, 30,881.30 and 7,449.20

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Solution

The fourth proportional to 20,599.75, 30,881.30 and 7,449.20 is: 11,167.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,599.75 : 30,881.30 = 7,449.20 : x
  2. Step 2: Convert to fraction form
    20,599.75/30,881.30 = 7,449.20/x
  3. Step 3: Cross multiply
    20,599.75x = 30,881.30 × 7,449.20
  4. Step 4: Simplify right side
    20,599.75x = 230,040,979.96
  5. Step 5: Solve for x
    x = 230,040,979.96/20,599.75
  6. Step 6: Final answer
    x = 11,167.17

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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.