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Finding the Third Proportional to 15,128.44 and 21,159.56

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Solution

The third proportional to 15,128.44 and 21,159.56 is: 29,595.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,128.44 : 21,159.56 = 21,159.56 : x
  2. Step 2: Convert to fraction form
    15,128.44/21,159.56 = 21,159.56/x
  3. Step 3: Cross multiply
    15,128.44x = 21,159.56 × 21,159.56
  4. Step 4: Simplify right side
    15,128.44x = 447,727,085.19
  5. Step 5: Solve for x
    x = 447,727,085.19/15,128.44
  6. Step 6: Final answer
    x = 29,595.06

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.