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Finding the Fourth Proportional to 7,768.47, 11,642.97 and 6,118.50

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Solution

The fourth proportional to 7,768.47, 11,642.97 and 6,118.50 is: 9,170.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,768.47 : 11,642.97 = 6,118.50 : x
  2. Step 2: Convert to fraction form
    7,768.47/11,642.97 = 6,118.50/x
  3. Step 3: Cross multiply
    7,768.47x = 11,642.97 × 6,118.50
  4. Step 4: Simplify right side
    7,768.47x = 71,237,511.95
  5. Step 5: Solve for x
    x = 71,237,511.95/7,768.47
  6. Step 6: Final answer
    x = 9,170.08

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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.