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Finding the Third Proportional to 12,990,514 and 18,161,520

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Solution

The third proportional to 12,990,514 and 18,161,520 is: 25,390,897.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,990,514 : 18,161,520 = 18,161,520 : x
  2. Step 2: Convert to fraction form
    12,990,514/18,161,520 = 18,161,520/x
  3. Step 3: Cross multiply
    12,990,514x = 18,161,520 × 18,161,520
  4. Step 4: Simplify right side
    12,990,514x = 329,840,808,710,400
  5. Step 5: Solve for x
    x = 329,840,808,710,400/12,990,514
  6. Step 6: Final answer
    x = 25,390,897.44

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.