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Finding the Fourth Proportional to 7,791.68, 10,748.78 and 5,663.91

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Solution

The fourth proportional to 7,791.68, 10,748.78 and 5,663.91 is: 7,813.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,791.68 : 10,748.78 = 5,663.91 : x
  2. Step 2: Convert to fraction form
    7,791.68/10,748.78 = 5,663.91/x
  3. Step 3: Cross multiply
    7,791.68x = 10,748.78 × 5,663.91
  4. Step 4: Simplify right side
    7,791.68x = 60,880,122.53
  5. Step 5: Solve for x
    x = 60,880,122.53/7,791.68
  6. Step 6: Final answer
    x = 7,813.48

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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.