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Finding the Fourth Proportional to 18,772.91, 25,904.86 and 11,217.74

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Solution

The fourth proportional to 18,772.91, 25,904.86 and 11,217.74 is: 15,479.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,772.91 : 25,904.86 = 11,217.74 : x
  2. Step 2: Convert to fraction form
    18,772.91/25,904.86 = 11,217.74/x
  3. Step 3: Cross multiply
    18,772.91x = 25,904.86 × 11,217.74
  4. Step 4: Simplify right side
    18,772.91x = 290,594,035.46
  5. Step 5: Solve for x
    x = 290,594,035.46/18,772.91
  6. Step 6: Final answer
    x = 15,479.43

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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.