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Finding the Fourth Proportional to 14,745.75, 20,349.14 and 8,121.75

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Solution

The fourth proportional to 14,745.75, 20,349.14 and 8,121.75 is: 11,208.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,745.75 : 20,349.14 = 8,121.75 : x
  2. Step 2: Convert to fraction form
    14,745.75/20,349.14 = 8,121.75/x
  3. Step 3: Cross multiply
    14,745.75x = 20,349.14 × 8,121.75
  4. Step 4: Simplify right side
    14,745.75x = 165,270,587.19
  5. Step 5: Solve for x
    x = 165,270,587.19/14,745.75
  6. Step 6: Final answer
    x = 11,208.02

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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.