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Finding the Fourth Proportional to 8,553.81, 12,830.72 and 3,291.30

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Solution

The fourth proportional to 8,553.81, 12,830.72 and 3,291.30 is: 4,936.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,553.81 : 12,830.72 = 3,291.30 : x
  2. Step 2: Convert to fraction form
    8,553.81/12,830.72 = 3,291.30/x
  3. Step 3: Cross multiply
    8,553.81x = 12,830.72 × 3,291.30
  4. Step 4: Simplify right side
    8,553.81x = 42,229,734.83
  5. Step 5: Solve for x
    x = 42,229,734.83/8,553.81
  6. Step 6: Final answer
    x = 4,936.95

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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.