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Finding the Fourth Proportional to 18,917.69, 26,102.45 and 10,959.44

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Solution

The fourth proportional to 18,917.69, 26,102.45 and 10,959.44 is: 15,121.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,917.69 : 26,102.45 = 10,959.44 : x
  2. Step 2: Convert to fraction form
    18,917.69/26,102.45 = 10,959.44/x
  3. Step 3: Cross multiply
    18,917.69x = 26,102.45 × 10,959.44
  4. Step 4: Simplify right side
    18,917.69x = 286,068,049.32
  5. Step 5: Solve for x
    x = 286,068,049.32/18,917.69
  6. Step 6: Final answer
    x = 15,121.73

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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.