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Finding the Fourth Proportional to 7,745.20, 11,642.10 and 7,307.80

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Solution

The fourth proportional to 7,745.20, 11,642.10 and 7,307.80 is: 10,984.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,745.20 : 11,642.10 = 7,307.80 : x
  2. Step 2: Convert to fraction form
    7,745.20/11,642.10 = 7,307.80/x
  3. Step 3: Cross multiply
    7,745.20x = 11,642.10 × 7,307.80
  4. Step 4: Simplify right side
    7,745.20x = 85,078,138.38
  5. Step 5: Solve for x
    x = 85,078,138.38/7,745.20
  6. Step 6: Final answer
    x = 10,984.63

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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.