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Finding the Fourth Proportional to 18,783.62, 25,910.13 and 12,410.42

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Solution

The fourth proportional to 18,783.62, 25,910.13 and 12,410.42 is: 17,118.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,783.62 : 25,910.13 = 12,410.42 : x
  2. Step 2: Convert to fraction form
    18,783.62/25,910.13 = 12,410.42/x
  3. Step 3: Cross multiply
    18,783.62x = 25,910.13 × 12,410.42
  4. Step 4: Simplify right side
    18,783.62x = 321,555,595.55
  5. Step 5: Solve for x
    x = 321,555,595.55/18,783.62
  6. Step 6: Final answer
    x = 17,118.94

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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.