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Finding the Fourth Proportional to 64,812, 97,218 and 21,036

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Solution

The fourth proportional to 64,812, 97,218 and 21,036 is: 31,554

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,812 : 97,218 = 21,036 : x
  2. Step 2: Convert to fraction form
    64,812/97,218 = 21,036/x
  3. Step 3: Cross multiply
    64,812x = 97,218 × 21,036
  4. Step 4: Simplify right side
    64,812x = 2,045,077,848
  5. Step 5: Solve for x
    x = 2,045,077,848/64,812
  6. Step 6: Final answer
    x = 31,554

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.