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Finding the Fourth Proportional to 7,871.78, 10,863.51 and 4,335.05

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Solution

The fourth proportional to 7,871.78, 10,863.51 and 4,335.05 is: 5,982.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,871.78 : 10,863.51 = 4,335.05 : x
  2. Step 2: Convert to fraction form
    7,871.78/10,863.51 = 4,335.05/x
  3. Step 3: Cross multiply
    7,871.78x = 10,863.51 × 4,335.05
  4. Step 4: Simplify right side
    7,871.78x = 47,093,859.03
  5. Step 5: Solve for x
    x = 47,093,859.03/7,871.78
  6. Step 6: Final answer
    x = 5,982.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.