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Finding the Fourth Proportional to 8,905.62, 12,290.20 and 5,369.96

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Solution

The fourth proportional to 8,905.62, 12,290.20 and 5,369.96 is: 7,410.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,905.62 : 12,290.20 = 5,369.96 : x
  2. Step 2: Convert to fraction form
    8,905.62/12,290.20 = 5,369.96/x
  3. Step 3: Cross multiply
    8,905.62x = 12,290.20 × 5,369.96
  4. Step 4: Simplify right side
    8,905.62x = 65,997,882.39
  5. Step 5: Solve for x
    x = 65,997,882.39/8,905.62
  6. Step 6: Final answer
    x = 7,410.81

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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.