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Finding the Fourth Proportional to 18,959.66, 28,416.42 and 13,414.60

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Solution

The fourth proportional to 18,959.66, 28,416.42 and 13,414.60 is: 20,105.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,959.66 : 28,416.42 = 13,414.60 : x
  2. Step 2: Convert to fraction form
    18,959.66/28,416.42 = 13,414.60/x
  3. Step 3: Cross multiply
    18,959.66x = 28,416.42 × 13,414.60
  4. Step 4: Simplify right side
    18,959.66x = 381,194,943.25
  5. Step 5: Solve for x
    x = 381,194,943.25/18,959.66
  6. Step 6: Final answer
    x = 20,105.58

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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.