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Finding the Fourth Proportional to 8,368.05, 12,551.40 and 2,821.28

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Solution

The fourth proportional to 8,368.05, 12,551.40 and 2,821.28 is: 4,231.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,368.05 : 12,551.40 = 2,821.28 : x
  2. Step 2: Convert to fraction form
    8,368.05/12,551.40 = 2,821.28/x
  3. Step 3: Cross multiply
    8,368.05x = 12,551.40 × 2,821.28
  4. Step 4: Simplify right side
    8,368.05x = 35,410,936.93
  5. Step 5: Solve for x
    x = 35,410,936.93/8,368.05
  6. Step 6: Final answer
    x = 4,231.68

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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.