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Finding the Third Proportional to 13,931,720 and 20,979,660

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Solution

The third proportional to 13,931,720 and 20,979,660 is: 31,593,093.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,931,720 : 20,979,660 = 20,979,660 : x
  2. Step 2: Convert to fraction form
    13,931,720/20,979,660 = 20,979,660/x
  3. Step 3: Cross multiply
    13,931,720x = 20,979,660 × 20,979,660
  4. Step 4: Simplify right side
    13,931,720x = 440,146,133,715,600
  5. Step 5: Solve for x
    x = 440,146,133,715,600/13,931,720
  6. Step 6: Final answer
    x = 31,593,093.58

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.