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Finding the Third Proportional to 12,855,240 and 19,921,464

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Solution

The third proportional to 12,855,240 and 19,921,464 is: 30,871,825.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,855,240 : 19,921,464 = 19,921,464 : x
  2. Step 2: Convert to fraction form
    12,855,240/19,921,464 = 19,921,464/x
  3. Step 3: Cross multiply
    12,855,240x = 19,921,464 × 19,921,464
  4. Step 4: Simplify right side
    12,855,240x = 396,864,727,903,296
  5. Step 5: Solve for x
    x = 396,864,727,903,296/12,855,240
  6. Step 6: Final answer
    x = 30,871,825.64

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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.