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Finding the Fourth Proportional to 8,815.92, 12,168.01 and 5,666.64

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Solution

The fourth proportional to 8,815.92, 12,168.01 and 5,666.64 is: 7,821.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,815.92 : 12,168.01 = 5,666.64 : x
  2. Step 2: Convert to fraction form
    8,815.92/12,168.01 = 5,666.64/x
  3. Step 3: Cross multiply
    8,815.92x = 12,168.01 × 5,666.64
  4. Step 4: Simplify right side
    8,815.92x = 68,951,718.02
  5. Step 5: Solve for x
    x = 68,951,718.02/8,815.92
  6. Step 6: Final answer
    x = 7,821.27

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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.