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Finding the Third Proportional to 7,980,369 and 12,382,209

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Solution

The third proportional to 7,980,369 and 12,382,209 is: 19,212,031.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,980,369 : 12,382,209 = 12,382,209 : x
  2. Step 2: Convert to fraction form
    7,980,369/12,382,209 = 12,382,209/x
  3. Step 3: Cross multiply
    7,980,369x = 12,382,209 × 12,382,209
  4. Step 4: Simplify right side
    7,980,369x = 153,319,099,719,681
  5. Step 5: Solve for x
    x = 153,319,099,719,681/7,980,369
  6. Step 6: Final answer
    x = 19,212,031.39

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.