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Finding the Fourth Proportional to 20,428.62, 30,599.85 and 9,344.64

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Solution

The fourth proportional to 20,428.62, 30,599.85 and 9,344.64 is: 13,997.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,428.62 : 30,599.85 = 9,344.64 : x
  2. Step 2: Convert to fraction form
    20,428.62/30,599.85 = 9,344.64/x
  3. Step 3: Cross multiply
    20,428.62x = 30,599.85 × 9,344.64
  4. Step 4: Simplify right side
    20,428.62x = 285,944,582.30
  5. Step 5: Solve for x
    x = 285,944,582.30/20,428.62
  6. Step 6: Final answer
    x = 13,997.25

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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.