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Finding the Fourth Proportional to 15,817.73, 21,827.79 and 8,647.52

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Solution

The fourth proportional to 15,817.73, 21,827.79 and 8,647.52 is: 11,933.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,817.73 : 21,827.79 = 8,647.52 : x
  2. Step 2: Convert to fraction form
    15,817.73/21,827.79 = 8,647.52/x
  3. Step 3: Cross multiply
    15,817.73x = 21,827.79 × 8,647.52
  4. Step 4: Simplify right side
    15,817.73x = 188,756,141.44
  5. Step 5: Solve for x
    x = 188,756,141.44/15,817.73
  6. Step 6: Final answer
    x = 11,933.20

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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.