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Finding the Third Proportional to 2,157.68 and 4,727.21

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Solution

The third proportional to 2,157.68 and 4,727.21 is: 10,356.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.68 : 4,727.21 = 4,727.21 : x
  2. Step 2: Convert to fraction form
    2,157.68/4,727.21 = 4,727.21/x
  3. Step 3: Cross multiply
    2,157.68x = 4,727.21 × 4,727.21
  4. Step 4: Simplify right side
    2,157.68x = 22,346,560.18
  5. Step 5: Solve for x
    x = 22,346,560.18/2,157.68
  6. Step 6: Final answer
    x = 10,356.76

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.