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Finding the Fourth Proportional to 7,871.76, 11,809.24 and 3,254.76

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Solution

The fourth proportional to 7,871.76, 11,809.24 and 3,254.76 is: 4,882.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,871.76 : 11,809.24 = 3,254.76 : x
  2. Step 2: Convert to fraction form
    7,871.76/11,809.24 = 3,254.76/x
  3. Step 3: Cross multiply
    7,871.76x = 11,809.24 × 3,254.76
  4. Step 4: Simplify right side
    7,871.76x = 38,436,241.98
  5. Step 5: Solve for x
    x = 38,436,241.98/7,871.76
  6. Step 6: Final answer
    x = 4,882.80

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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.