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Finding the Fourth Proportional to 9,171.11, 13,775.07 and 8,912.72

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Solution

The fourth proportional to 9,171.11, 13,775.07 and 8,912.72 is: 13,386.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,171.11 : 13,775.07 = 8,912.72 : x
  2. Step 2: Convert to fraction form
    9,171.11/13,775.07 = 8,912.72/x
  3. Step 3: Cross multiply
    9,171.11x = 13,775.07 × 8,912.72
  4. Step 4: Simplify right side
    9,171.11x = 122,773,341.89
  5. Step 5: Solve for x
    x = 122,773,341.89/9,171.11
  6. Step 6: Final answer
    x = 13,386.97

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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.