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Finding the Third Proportional to 15,756.19 and 18,388.69

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Solution

The third proportional to 15,756.19 and 18,388.69 is: 21,461.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,756.19 : 18,388.69 = 18,388.69 : x
  2. Step 2: Convert to fraction form
    15,756.19/18,388.69 = 18,388.69/x
  3. Step 3: Cross multiply
    15,756.19x = 18,388.69 × 18,388.69
  4. Step 4: Simplify right side
    15,756.19x = 338,143,827.97
  5. Step 5: Solve for x
    x = 338,143,827.97/15,756.19
  6. Step 6: Final answer
    x = 21,461.02

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Why These Related Problems?

These problems maintain the same ratio (1.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.