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Finding the Third Proportional to 7,221,515 and 15,859,990

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Solution

The third proportional to 7,221,515 and 15,859,990 is: 34,831,926.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,221,515 : 15,859,990 = 15,859,990 : x
  2. Step 2: Convert to fraction form
    7,221,515/15,859,990 = 15,859,990/x
  3. Step 3: Cross multiply
    7,221,515x = 15,859,990 × 15,859,990
  4. Step 4: Simplify right side
    7,221,515x = 251,539,282,800,100
  5. Step 5: Solve for x
    x = 251,539,282,800,100/7,221,515
  6. Step 6: Final answer
    x = 34,831,926.93

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.