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Finding the Third Proportional to 15,728,420 and 21,250,079

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Solution

The third proportional to 15,728,420 and 21,250,079 is: 28,710,185.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,728,420 : 21,250,079 = 21,250,079 : x
  2. Step 2: Convert to fraction form
    15,728,420/21,250,079 = 21,250,079/x
  3. Step 3: Cross multiply
    15,728,420x = 21,250,079 × 21,250,079
  4. Step 4: Simplify right side
    15,728,420x = 451,565,857,506,241
  5. Step 5: Solve for x
    x = 451,565,857,506,241/15,728,420
  6. Step 6: Final answer
    x = 28,710,185.61

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.