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Finding the Third Proportional to 7,218.07 and 10,721.53

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Solution

The third proportional to 7,218.07 and 10,721.53 is: 15,925.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,218.07 : 10,721.53 = 10,721.53 : x
  2. Step 2: Convert to fraction form
    7,218.07/10,721.53 = 10,721.53/x
  3. Step 3: Cross multiply
    7,218.07x = 10,721.53 × 10,721.53
  4. Step 4: Simplify right side
    7,218.07x = 114,951,232.34
  5. Step 5: Solve for x
    x = 114,951,232.34/7,218.07
  6. Step 6: Final answer
    x = 15,925.48

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.