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Finding the Fourth Proportional to 8,005.70, 12,008.55 and 2,812.10

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Solution

The fourth proportional to 8,005.70, 12,008.55 and 2,812.10 is: 4,218.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,005.70 : 12,008.55 = 2,812.10 : x
  2. Step 2: Convert to fraction form
    8,005.70/12,008.55 = 2,812.10/x
  3. Step 3: Cross multiply
    8,005.70x = 12,008.55 × 2,812.10
  4. Step 4: Simplify right side
    8,005.70x = 33,769,243.46
  5. Step 5: Solve for x
    x = 33,769,243.46/8,005.70
  6. Step 6: Final answer
    x = 4,218.15

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Similar ratio
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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.