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Finding the Fourth Proportional to 18,656.25, 25,745.64 and 10,272.75

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Solution

The fourth proportional to 18,656.25, 25,745.64 and 10,272.75 is: 14,176.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,656.25 : 25,745.64 = 10,272.75 : x
  2. Step 2: Convert to fraction form
    18,656.25/25,745.64 = 10,272.75/x
  3. Step 3: Cross multiply
    18,656.25x = 25,745.64 × 10,272.75
  4. Step 4: Simplify right side
    18,656.25x = 264,478,523.31
  5. Step 5: Solve for x
    x = 264,478,523.31/18,656.25
  6. Step 6: Final answer
    x = 14,176.40

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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.