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Finding the Fourth Proportional to 6,902.80, 10,355.12 and 2,221.68

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Solution

The fourth proportional to 6,902.80, 10,355.12 and 2,221.68 is: 3,332.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,902.80 : 10,355.12 = 2,221.68 : x
  2. Step 2: Convert to fraction form
    6,902.80/10,355.12 = 2,221.68/x
  3. Step 3: Cross multiply
    6,902.80x = 10,355.12 × 2,221.68
  4. Step 4: Simplify right side
    6,902.80x = 23,005,763.00
  5. Step 5: Solve for x
    x = 23,005,763.00/6,902.80
  6. Step 6: Final answer
    x = 3,332.82

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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.