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Finding the Fourth Proportional to 15,150.71, 20,906.85 and 8,435.94

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Solution

The fourth proportional to 15,150.71, 20,906.85 and 8,435.94 is: 11,640.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,150.71 : 20,906.85 = 8,435.94 : x
  2. Step 2: Convert to fraction form
    15,150.71/20,906.85 = 8,435.94/x
  3. Step 3: Cross multiply
    15,150.71x = 20,906.85 × 8,435.94
  4. Step 4: Simplify right side
    15,150.71x = 176,368,932.19
  5. Step 5: Solve for x
    x = 176,368,932.19/15,150.71
  6. Step 6: Final answer
    x = 11,640.97

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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.