Home / 7,878.92-11,818.38-3,977.96

Finding the Fourth Proportional to 7,878.92, 11,818.38 and 3,977.96

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Solution

The fourth proportional to 7,878.92, 11,818.38 and 3,977.96 is: 5,966.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,878.92 : 11,818.38 = 3,977.96 : x
  2. Step 2: Convert to fraction form
    7,878.92/11,818.38 = 3,977.96/x
  3. Step 3: Cross multiply
    7,878.92x = 11,818.38 × 3,977.96
  4. Step 4: Simplify right side
    7,878.92x = 47,013,042.90
  5. Step 5: Solve for x
    x = 47,013,042.90/7,878.92
  6. Step 6: Final answer
    x = 5,966.94

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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.