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Finding the Fourth Proportional to 18,656.38, 25,745.74 and 10,272.88

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Solution

The fourth proportional to 18,656.38, 25,745.74 and 10,272.88 is: 14,176.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,656.38 : 25,745.74 = 10,272.88 : x
  2. Step 2: Convert to fraction form
    18,656.38/25,745.74 = 10,272.88/x
  3. Step 3: Cross multiply
    18,656.38x = 25,745.74 × 10,272.88
  4. Step 4: Simplify right side
    18,656.38x = 264,482,897.53
  5. Step 5: Solve for x
    x = 264,482,897.53/18,656.38
  6. Step 6: Final answer
    x = 14,176.54

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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.