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Finding the Fourth Proportional to 7,871.30, 10,859.46 and 4,512.92

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Solution

The fourth proportional to 7,871.30, 10,859.46 and 4,512.92 is: 6,226.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,871.30 : 10,859.46 = 4,512.92 : x
  2. Step 2: Convert to fraction form
    7,871.30/10,859.46 = 4,512.92/x
  3. Step 3: Cross multiply
    7,871.30x = 10,859.46 × 4,512.92
  4. Step 4: Simplify right side
    7,871.30x = 49,007,874.22
  5. Step 5: Solve for x
    x = 49,007,874.22/7,871.30
  6. Step 6: Final answer
    x = 6,226.15

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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.