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Finding the Fourth Proportional to 18,297.12, 25,249.96 and 9,913.64

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Solution

The fourth proportional to 18,297.12, 25,249.96 and 9,913.64 is: 13,680.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,297.12 : 25,249.96 = 9,913.64 : x
  2. Step 2: Convert to fraction form
    18,297.12/25,249.96 = 9,913.64/x
  3. Step 3: Cross multiply
    18,297.12x = 25,249.96 × 9,913.64
  4. Step 4: Simplify right side
    18,297.12x = 250,319,013.45
  5. Step 5: Solve for x
    x = 250,319,013.45/18,297.12
  6. Step 6: Final answer
    x = 13,680.79

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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.