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Finding the Fourth Proportional to 8,920.60, 12,272.68 and 8,674.55

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Solution

The fourth proportional to 8,920.60, 12,272.68 and 8,674.55 is: 11,934.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.60 : 12,272.68 = 8,674.55 : x
  2. Step 2: Convert to fraction form
    8,920.60/12,272.68 = 8,674.55/x
  3. Step 3: Cross multiply
    8,920.60x = 12,272.68 × 8,674.55
  4. Step 4: Simplify right side
    8,920.60x = 106,459,976.29
  5. Step 5: Solve for x
    x = 106,459,976.29/8,920.60
  6. Step 6: Final answer
    x = 11,934.17

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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.