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Finding the Third Proportional to 15,886.13 and 20,751.19

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Solution

The third proportional to 15,886.13 and 20,751.19 is: 27,106.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,886.13 : 20,751.19 = 20,751.19 : x
  2. Step 2: Convert to fraction form
    15,886.13/20,751.19 = 20,751.19/x
  3. Step 3: Cross multiply
    15,886.13x = 20,751.19 × 20,751.19
  4. Step 4: Simplify right side
    15,886.13x = 430,611,782.66
  5. Step 5: Solve for x
    x = 430,611,782.66/15,886.13
  6. Step 6: Final answer
    x = 27,106.16

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Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.