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Finding the Third Proportional to 7,129,786 and 15,395,900

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Solution

The third proportional to 7,129,786 and 15,395,900 is: 33,245,561.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129,786 : 15,395,900 = 15,395,900 : x
  2. Step 2: Convert to fraction form
    7,129,786/15,395,900 = 15,395,900/x
  3. Step 3: Cross multiply
    7,129,786x = 15,395,900 × 15,395,900
  4. Step 4: Simplify right side
    7,129,786x = 237,033,736,810,000
  5. Step 5: Solve for x
    x = 237,033,736,810,000/7,129,786
  6. Step 6: Final answer
    x = 33,245,561.20

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.