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Finding the Fourth Proportional to 20,384.62, 30,579.97 and 7,235.89

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Solution

The fourth proportional to 20,384.62, 30,579.97 and 7,235.89 is: 10,854.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,384.62 : 30,579.97 = 7,235.89 : x
  2. Step 2: Convert to fraction form
    20,384.62/30,579.97 = 7,235.89/x
  3. Step 3: Cross multiply
    20,384.62x = 30,579.97 × 7,235.89
  4. Step 4: Simplify right side
    20,384.62x = 221,273,299.12
  5. Step 5: Solve for x
    x = 221,273,299.12/20,384.62
  6. Step 6: Final answer
    x = 10,854.91

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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.