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Finding the Fourth Proportional to 8,920.69, 12,311.26 and 4,942.17

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Solution

The fourth proportional to 8,920.69, 12,311.26 and 4,942.17 is: 6,820.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.69 : 12,311.26 = 4,942.17 : x
  2. Step 2: Convert to fraction form
    8,920.69/12,311.26 = 4,942.17/x
  3. Step 3: Cross multiply
    8,920.69x = 12,311.26 × 4,942.17
  4. Step 4: Simplify right side
    8,920.69x = 60,844,327.48
  5. Step 5: Solve for x
    x = 60,844,327.48/8,920.69
  6. Step 6: Final answer
    x = 6,820.59

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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.