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Finding the Fourth Proportional to 7,911.73, 11,857.21 and 5,821.94

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Solution

The fourth proportional to 7,911.73, 11,857.21 and 5,821.94 is: 8,725.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,911.73 : 11,857.21 = 5,821.94 : x
  2. Step 2: Convert to fraction form
    7,911.73/11,857.21 = 5,821.94/x
  3. Step 3: Cross multiply
    7,911.73x = 11,857.21 × 5,821.94
  4. Step 4: Simplify right side
    7,911.73x = 69,031,980.54
  5. Step 5: Solve for x
    x = 69,031,980.54/7,911.73
  6. Step 6: Final answer
    x = 8,725.28

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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.