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Finding the Fourth Proportional to 8,428.05, 12,642.08 and 2,885.22

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Solution

The fourth proportional to 8,428.05, 12,642.08 and 2,885.22 is: 4,327.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,428.05 : 12,642.08 = 2,885.22 : x
  2. Step 2: Convert to fraction form
    8,428.05/12,642.08 = 2,885.22/x
  3. Step 3: Cross multiply
    8,428.05x = 12,642.08 × 2,885.22
  4. Step 4: Simplify right side
    8,428.05x = 36,475,167.63
  5. Step 5: Solve for x
    x = 36,475,167.63/8,428.05
  6. Step 6: Final answer
    x = 4,327.83

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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.