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Finding the Fourth Proportional to 9,187.95, 12,665.79 and 7,169.09

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Solution

The fourth proportional to 9,187.95, 12,665.79 and 7,169.09 is: 9,882.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,187.95 : 12,665.79 = 7,169.09 : x
  2. Step 2: Convert to fraction form
    9,187.95/12,665.79 = 7,169.09/x
  3. Step 3: Cross multiply
    9,187.95x = 12,665.79 × 7,169.09
  4. Step 4: Simplify right side
    9,187.95x = 90,802,220.10
  5. Step 5: Solve for x
    x = 90,802,220.10/9,187.95
  6. Step 6: Final answer
    x = 9,882.75

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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.