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Finding the Fourth Proportional to 8,905.96, 12,290.70 and 5,369.68

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Solution

The fourth proportional to 8,905.96, 12,290.70 and 5,369.68 is: 7,410.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,905.96 : 12,290.70 = 5,369.68 : x
  2. Step 2: Convert to fraction form
    8,905.96/12,290.70 = 5,369.68/x
  3. Step 3: Cross multiply
    8,905.96x = 12,290.70 × 5,369.68
  4. Step 4: Simplify right side
    8,905.96x = 65,997,125.98
  5. Step 5: Solve for x
    x = 65,997,125.98/8,905.96
  6. Step 6: Final answer
    x = 7,410.44

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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.