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Finding the Fourth Proportional to 7,717.89, 11,578.44 and 3,100.89

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Solution

The fourth proportional to 7,717.89, 11,578.44 and 3,100.89 is: 4,651.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,717.89 : 11,578.44 = 3,100.89 : x
  2. Step 2: Convert to fraction form
    7,717.89/11,578.44 = 3,100.89/x
  3. Step 3: Cross multiply
    7,717.89x = 11,578.44 × 3,100.89
  4. Step 4: Simplify right side
    7,717.89x = 35,903,468.81
  5. Step 5: Solve for x
    x = 35,903,468.81/7,717.89
  6. Step 6: Final answer
    x = 4,651.98

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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.