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Finding the Fourth Proportional to 9,079.11, 13,605.90 and 7,221.99

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Solution

The fourth proportional to 9,079.11, 13,605.90 and 7,221.99 is: 10,822.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,079.11 : 13,605.90 = 7,221.99 : x
  2. Step 2: Convert to fraction form
    9,079.11/13,605.90 = 7,221.99/x
  3. Step 3: Cross multiply
    9,079.11x = 13,605.90 × 7,221.99
  4. Step 4: Simplify right side
    9,079.11x = 98,261,673.74
  5. Step 5: Solve for x
    x = 98,261,673.74/9,079.11
  6. Step 6: Final answer
    x = 10,822.83

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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.