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Finding the Fourth Proportional to 8,078.76, 11,148.84 and 4,721.85

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Solution

The fourth proportional to 8,078.76, 11,148.84 and 4,721.85 is: 6,516.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,078.76 : 11,148.84 = 4,721.85 : x
  2. Step 2: Convert to fraction form
    8,078.76/11,148.84 = 4,721.85/x
  3. Step 3: Cross multiply
    8,078.76x = 11,148.84 × 4,721.85
  4. Step 4: Simplify right side
    8,078.76x = 52,643,150.15
  5. Step 5: Solve for x
    x = 52,643,150.15/8,078.76
  6. Step 6: Final answer
    x = 6,516.24

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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.