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Finding the Fourth Proportional to 18,645, 25,730.10 and 11,193

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Solution

The fourth proportional to 18,645, 25,730.10 and 11,193 is: 15,446.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,645 : 25,730.10 = 11,193 : x
  2. Step 2: Convert to fraction form
    18,645/25,730.10 = 11,193/x
  3. Step 3: Cross multiply
    18,645x = 25,730.10 × 11,193
  4. Step 4: Simplify right side
    18,645x = 287,997,009.30
  5. Step 5: Solve for x
    x = 287,997,009.30/18,645
  6. Step 6: Final answer
    x = 15,446.34

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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.