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Finding the Fourth Proportional to 12,657.45, 18,986.19 and 3,892.29

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Solution

The fourth proportional to 12,657.45, 18,986.19 and 3,892.29 is: 5,838.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,657.45 : 18,986.19 = 3,892.29 : x
  2. Step 2: Convert to fraction form
    12,657.45/18,986.19 = 3,892.29/x
  3. Step 3: Cross multiply
    12,657.45x = 18,986.19 × 3,892.29
  4. Step 4: Simplify right side
    12,657.45x = 73,899,757.48
  5. Step 5: Solve for x
    x = 73,899,757.48/12,657.45
  6. Step 6: Final answer
    x = 5,838.44

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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.