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Finding the Third Proportional to 12,921,282 and 20,017,200.94

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Solution

The third proportional to 12,921,282 and 20,017,200.94 is: 31,009,951.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,921,282 : 20,017,200.94 = 20,017,200.94 : x
  2. Step 2: Convert to fraction form
    12,921,282/20,017,200.94 = 20,017,200.94/x
  3. Step 3: Cross multiply
    12,921,282x = 20,017,200.94 × 20,017,200.94
  4. Step 4: Simplify right side
    12,921,282x = 400,688,333,372,250.88
  5. Step 5: Solve for x
    x = 400,688,333,372,250.88/12,921,282
  6. Step 6: Final answer
    x = 31,009,951.91

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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.