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Finding the Fourth Proportional to 15,198.91, 20,972.38 and 8,483.90

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Solution

The fourth proportional to 15,198.91, 20,972.38 and 8,483.90 is: 11,706.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,198.91 : 20,972.38 = 8,483.90 : x
  2. Step 2: Convert to fraction form
    15,198.91/20,972.38 = 8,483.90/x
  3. Step 3: Cross multiply
    15,198.91x = 20,972.38 × 8,483.90
  4. Step 4: Simplify right side
    15,198.91x = 177,927,574.68
  5. Step 5: Solve for x
    x = 177,927,574.68/15,198.91
  6. Step 6: Final answer
    x = 11,706.60

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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.