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Finding the Fourth Proportional to 12,774.78, 17,629.07 and 7,109.44

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Solution

The fourth proportional to 12,774.78, 17,629.07 and 7,109.44 is: 9,810.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,774.78 : 17,629.07 = 7,109.44 : x
  2. Step 2: Convert to fraction form
    12,774.78/17,629.07 = 7,109.44/x
  3. Step 3: Cross multiply
    12,774.78x = 17,629.07 × 7,109.44
  4. Step 4: Simplify right side
    12,774.78x = 125,332,789.12
  5. Step 5: Solve for x
    x = 125,332,789.12/12,774.78
  6. Step 6: Final answer
    x = 9,810.95

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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.