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Finding the Fourth Proportional to 7,910.33, 10,920.62 and 5,920.16

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Solution

The fourth proportional to 7,910.33, 10,920.62 and 5,920.16 is: 8,173.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,910.33 : 10,920.62 = 5,920.16 : x
  2. Step 2: Convert to fraction form
    7,910.33/10,920.62 = 5,920.16/x
  3. Step 3: Cross multiply
    7,910.33x = 10,920.62 × 5,920.16
  4. Step 4: Simplify right side
    7,910.33x = 64,651,777.90
  5. Step 5: Solve for x
    x = 64,651,777.90/7,910.33
  6. Step 6: Final answer
    x = 8,173.09

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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.