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Finding the Fourth Proportional to 15,136.30, 20,887.76 and 8,763.16

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Solution

The fourth proportional to 15,136.30, 20,887.76 and 8,763.16 is: 12,092.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,136.30 : 20,887.76 = 8,763.16 : x
  2. Step 2: Convert to fraction form
    15,136.30/20,887.76 = 8,763.16/x
  3. Step 3: Cross multiply
    15,136.30x = 20,887.76 × 8,763.16
  4. Step 4: Simplify right side
    15,136.30x = 183,042,782.92
  5. Step 5: Solve for x
    x = 183,042,782.92/15,136.30
  6. Step 6: Final answer
    x = 12,092.97

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.