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Finding the Third Proportional to 8,638,974 and 18,663,408

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Solution

The third proportional to 8,638,974 and 18,663,408 is: 40,319,926.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,638,974 : 18,663,408 = 18,663,408 : x
  2. Step 2: Convert to fraction form
    8,638,974/18,663,408 = 18,663,408/x
  3. Step 3: Cross multiply
    8,638,974x = 18,663,408 × 18,663,408
  4. Step 4: Simplify right side
    8,638,974x = 348,322,798,174,464
  5. Step 5: Solve for x
    x = 348,322,798,174,464/8,638,974
  6. Step 6: Final answer
    x = 40,319,926.67

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.