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Finding the Fourth Proportional to 12,653.30, 18,978.02 and 4,331.41

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Solution

The fourth proportional to 12,653.30, 18,978.02 and 4,331.41 is: 6,496.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,653.30 : 18,978.02 = 4,331.41 : x
  2. Step 2: Convert to fraction form
    12,653.30/18,978.02 = 4,331.41/x
  3. Step 3: Cross multiply
    12,653.30x = 18,978.02 × 4,331.41
  4. Step 4: Simplify right side
    12,653.30x = 82,201,548.99
  5. Step 5: Solve for x
    x = 82,201,548.99/12,653.30
  6. Step 6: Final answer
    x = 6,496.45

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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.