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Finding the Fourth Proportional to 7,887.89, 11,874.58 and 7,198.99

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Solution

The fourth proportional to 7,887.89, 11,874.58 and 7,198.99 is: 10,837.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,887.89 : 11,874.58 = 7,198.99 : x
  2. Step 2: Convert to fraction form
    7,887.89/11,874.58 = 7,198.99/x
  3. Step 3: Cross multiply
    7,887.89x = 11,874.58 × 7,198.99
  4. Step 4: Simplify right side
    7,887.89x = 85,484,934.99
  5. Step 5: Solve for x
    x = 85,484,934.99/7,887.89
  6. Step 6: Final answer
    x = 10,837.49

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.