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Finding the Fourth Proportional to 13,878.44, 19,151.44 and 7,910.06

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Solution

The fourth proportional to 13,878.44, 19,151.44 and 7,910.06 is: 10,915.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,878.44 : 19,151.44 = 7,910.06 : x
  2. Step 2: Convert to fraction form
    13,878.44/19,151.44 = 7,910.06/x
  3. Step 3: Cross multiply
    13,878.44x = 19,151.44 × 7,910.06
  4. Step 4: Simplify right side
    13,878.44x = 151,488,923.95
  5. Step 5: Solve for x
    x = 151,488,923.95/13,878.44
  6. Step 6: Final answer
    x = 10,915.42

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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.