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Finding the Third Proportional to 15,324.19 and 21,685.22

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Solution

The third proportional to 15,324.19 and 21,685.22 is: 30,686.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,324.19 : 21,685.22 = 21,685.22 : x
  2. Step 2: Convert to fraction form
    15,324.19/21,685.22 = 21,685.22/x
  3. Step 3: Cross multiply
    15,324.19x = 21,685.22 × 21,685.22
  4. Step 4: Simplify right side
    15,324.19x = 470,248,712.24
  5. Step 5: Solve for x
    x = 470,248,712.24/15,324.19
  6. Step 6: Final answer
    x = 30,686.70

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.