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Finding the Fourth Proportional to 9,161.60, 13,760.81 and 8,903.21

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Solution

The fourth proportional to 9,161.60, 13,760.81 and 8,903.21 is: 13,372.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,161.60 : 13,760.81 = 8,903.21 : x
  2. Step 2: Convert to fraction form
    9,161.60/13,760.81 = 8,903.21/x
  3. Step 3: Cross multiply
    9,161.60x = 13,760.81 × 8,903.21
  4. Step 4: Simplify right side
    9,161.60x = 122,515,267.88
  5. Step 5: Solve for x
    x = 122,515,267.88/9,161.60
  6. Step 6: Final answer
    x = 13,372.70

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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.