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Finding the Fourth Proportional to 13,843.88, 20,774.12 and 5,079.68

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Solution

The fourth proportional to 13,843.88, 20,774.12 and 5,079.68 is: 7,622.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,843.88 : 20,774.12 = 5,079.68 : x
  2. Step 2: Convert to fraction form
    13,843.88/20,774.12 = 5,079.68/x
  3. Step 3: Cross multiply
    13,843.88x = 20,774.12 × 5,079.68
  4. Step 4: Simplify right side
    13,843.88x = 105,525,881.88
  5. Step 5: Solve for x
    x = 105,525,881.88/13,843.88
  6. Step 6: Final answer
    x = 7,622.57

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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.