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Finding the Fourth Proportional to 15,299.65, 21,109.92 and 8,922.43

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Solution

The fourth proportional to 15,299.65, 21,109.92 and 8,922.43 is: 12,310.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,299.65 : 21,109.92 = 8,922.43 : x
  2. Step 2: Convert to fraction form
    15,299.65/21,109.92 = 8,922.43/x
  3. Step 3: Cross multiply
    15,299.65x = 21,109.92 × 8,922.43
  4. Step 4: Simplify right side
    15,299.65x = 188,351,783.51
  5. Step 5: Solve for x
    x = 188,351,783.51/15,299.65
  6. Step 6: Final answer
    x = 12,310.86

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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.