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Finding the Third Proportional to 15,400.13 and 16,721.44

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Solution

The third proportional to 15,400.13 and 16,721.44 is: 18,156.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,400.13 : 16,721.44 = 16,721.44 : x
  2. Step 2: Convert to fraction form
    15,400.13/16,721.44 = 16,721.44/x
  3. Step 3: Cross multiply
    15,400.13x = 16,721.44 × 16,721.44
  4. Step 4: Simplify right side
    15,400.13x = 279,606,472.07
  5. Step 5: Solve for x
    x = 279,606,472.07/15,400.13
  6. Step 6: Final answer
    x = 18,156.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.