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Finding the Fourth Proportional to 8,005.38, 12,000.81 and 2,808.42

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Solution

The fourth proportional to 8,005.38, 12,000.81 and 2,808.42 is: 4,210.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,005.38 : 12,000.81 = 2,808.42 : x
  2. Step 2: Convert to fraction form
    8,005.38/12,000.81 = 2,808.42/x
  3. Step 3: Cross multiply
    8,005.38x = 12,000.81 × 2,808.42
  4. Step 4: Simplify right side
    8,005.38x = 33,703,314.82
  5. Step 5: Solve for x
    x = 33,703,314.82/8,005.38
  6. Step 6: Final answer
    x = 4,210.08

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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.