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Finding the Fourth Proportional to 8,251.71, 12,355.43 and 6,939.51

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Solution

The fourth proportional to 8,251.71, 12,355.43 and 6,939.51 is: 10,390.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,251.71 : 12,355.43 = 6,939.51 : x
  2. Step 2: Convert to fraction form
    8,251.71/12,355.43 = 6,939.51/x
  3. Step 3: Cross multiply
    8,251.71x = 12,355.43 × 6,939.51
  4. Step 4: Simplify right side
    8,251.71x = 85,740,595.34
  5. Step 5: Solve for x
    x = 85,740,595.34/8,251.71
  6. Step 6: Final answer
    x = 10,390.65

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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.