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Finding the Fourth Proportional to 18,467.76, 25,468.50 and 12,508.20

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Solution

The fourth proportional to 18,467.76, 25,468.50 and 12,508.20 is: 17,249.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,467.76 : 25,468.50 = 12,508.20 : x
  2. Step 2: Convert to fraction form
    18,467.76/25,468.50 = 12,508.20/x
  3. Step 3: Cross multiply
    18,467.76x = 25,468.50 × 12,508.20
  4. Step 4: Simplify right side
    18,467.76x = 318,565,091.70
  5. Step 5: Solve for x
    x = 318,565,091.70/18,467.76
  6. Step 6: Final answer
    x = 17,249.80

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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.