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Finding the Fourth Proportional to 18,709.62, 28,058.94 and 15,414.54

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Solution

The fourth proportional to 18,709.62, 28,058.94 and 15,414.54 is: 23,117.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,709.62 : 28,058.94 = 15,414.54 : x
  2. Step 2: Convert to fraction form
    18,709.62/28,058.94 = 15,414.54/x
  3. Step 3: Cross multiply
    18,709.62x = 28,058.94 × 15,414.54
  4. Step 4: Simplify right side
    18,709.62x = 432,515,652.99
  5. Step 5: Solve for x
    x = 432,515,652.99/18,709.62
  6. Step 6: Final answer
    x = 23,117.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.