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Finding the Fourth Proportional to 7,878.92, 10,871.30 and 4,522.82

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Solution

The fourth proportional to 7,878.92, 10,871.30 and 4,522.82 is: 6,240.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,878.92 : 10,871.30 = 4,522.82 : x
  2. Step 2: Convert to fraction form
    7,878.92/10,871.30 = 4,522.82/x
  3. Step 3: Cross multiply
    7,878.92x = 10,871.30 × 4,522.82
  4. Step 4: Simplify right side
    7,878.92x = 49,168,890.02
  5. Step 5: Solve for x
    x = 49,168,890.02/7,878.92
  6. Step 6: Final answer
    x = 6,240.57

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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.