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Finding the Third Proportional to 12,990,516 and 18,161,510

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Solution

The third proportional to 12,990,516 and 18,161,510 is: 25,390,865.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,990,516 : 18,161,510 = 18,161,510 : x
  2. Step 2: Convert to fraction form
    12,990,516/18,161,510 = 18,161,510/x
  3. Step 3: Cross multiply
    12,990,516x = 18,161,510 × 18,161,510
  4. Step 4: Simplify right side
    12,990,516x = 329,840,445,480,100
  5. Step 5: Solve for x
    x = 329,840,445,480,100/12,990,516
  6. Step 6: Final answer
    x = 25,390,865.57

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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.