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Finding the Third Proportional to 11,811,820 and 18,221,426

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Solution

The third proportional to 11,811,820 and 18,221,426 is: 28,109,162.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,811,820 : 18,221,426 = 18,221,426 : x
  2. Step 2: Convert to fraction form
    11,811,820/18,221,426 = 18,221,426/x
  3. Step 3: Cross multiply
    11,811,820x = 18,221,426 × 18,221,426
  4. Step 4: Simplify right side
    11,811,820x = 332,020,365,473,476
  5. Step 5: Solve for x
    x = 332,020,365,473,476/11,811,820
  6. Step 6: Final answer
    x = 28,109,162.30

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.