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Finding the Fourth Proportional to 15,122.97, 20,869.70 and 8,498.97

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Solution

The fourth proportional to 15,122.97, 20,869.70 and 8,498.97 is: 11,728.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,122.97 : 20,869.70 = 8,498.97 : x
  2. Step 2: Convert to fraction form
    15,122.97/20,869.70 = 8,498.97/x
  3. Step 3: Cross multiply
    15,122.97x = 20,869.70 × 8,498.97
  4. Step 4: Simplify right side
    15,122.97x = 177,370,911.71
  5. Step 5: Solve for x
    x = 177,370,911.71/15,122.97
  6. Step 6: Final answer
    x = 11,728.58

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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.