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Finding the Third Proportional to 8,368,920 and 12,931,920

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Solution

The third proportional to 8,368,920 and 12,931,920 is: 19,982,811.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,368,920 : 12,931,920 = 12,931,920 : x
  2. Step 2: Convert to fraction form
    8,368,920/12,931,920 = 12,931,920/x
  3. Step 3: Cross multiply
    8,368,920x = 12,931,920 × 12,931,920
  4. Step 4: Simplify right side
    8,368,920x = 167,234,554,886,400
  5. Step 5: Solve for x
    x = 167,234,554,886,400/8,368,920
  6. Step 6: Final answer
    x = 19,982,811.99

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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.