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Finding the Fourth Proportional to 8,728.59, 13,098.75 and 8,696.48

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Solution

The fourth proportional to 8,728.59, 13,098.75 and 8,696.48 is: 13,050.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,728.59 : 13,098.75 = 8,696.48 : x
  2. Step 2: Convert to fraction form
    8,728.59/13,098.75 = 8,696.48/x
  3. Step 3: Cross multiply
    8,728.59x = 13,098.75 × 8,696.48
  4. Step 4: Simplify right side
    8,728.59x = 113,912,951.91
  5. Step 5: Solve for x
    x = 113,912,951.91/8,728.59
  6. Step 6: Final answer
    x = 13,050.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.