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Finding the Fourth Proportional to 18,379.08, 25,363.10 and 11,208.98

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Solution

The fourth proportional to 18,379.08, 25,363.10 and 11,208.98 is: 15,468.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,379.08 : 25,363.10 = 11,208.98 : x
  2. Step 2: Convert to fraction form
    18,379.08/25,363.10 = 11,208.98/x
  3. Step 3: Cross multiply
    18,379.08x = 25,363.10 × 11,208.98
  4. Step 4: Simplify right side
    18,379.08x = 284,294,480.64
  5. Step 5: Solve for x
    x = 284,294,480.64/18,379.08
  6. Step 6: Final answer
    x = 15,468.37

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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.