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Finding the Fourth Proportional to 8,972.55, 12,380.58 and 8,246.70

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Solution

The fourth proportional to 8,972.55, 12,380.58 and 8,246.70 is: 11,379.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,972.55 : 12,380.58 = 8,246.70 : x
  2. Step 2: Convert to fraction form
    8,972.55/12,380.58 = 8,246.70/x
  3. Step 3: Cross multiply
    8,972.55x = 12,380.58 × 8,246.70
  4. Step 4: Simplify right side
    8,972.55x = 102,098,929.09
  5. Step 5: Solve for x
    x = 102,098,929.09/8,972.55
  6. Step 6: Final answer
    x = 11,379.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.