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Finding the Fourth Proportional to 9,172.11, 13,776.57 and 8,913.72

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Solution

The fourth proportional to 9,172.11, 13,776.57 and 8,913.72 is: 13,388.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,172.11 : 13,776.57 = 8,913.72 : x
  2. Step 2: Convert to fraction form
    9,172.11/13,776.57 = 8,913.72/x
  3. Step 3: Cross multiply
    9,172.11x = 13,776.57 × 8,913.72
  4. Step 4: Simplify right side
    9,172.11x = 122,800,487.54
  5. Step 5: Solve for x
    x = 122,800,487.54/9,172.11
  6. Step 6: Final answer
    x = 13,388.47

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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.