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Finding the Fourth Proportional to 11,915.32, 16,443.48 and 6,538

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Solution

The fourth proportional to 11,915.32, 16,443.48 and 6,538 is: 9,022.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,915.32 : 16,443.48 = 6,538 : x
  2. Step 2: Convert to fraction form
    11,915.32/16,443.48 = 6,538/x
  3. Step 3: Cross multiply
    11,915.32x = 16,443.48 × 6,538
  4. Step 4: Simplify right side
    11,915.32x = 107,507,472.24
  5. Step 5: Solve for x
    x = 107,507,472.24/11,915.32
  6. Step 6: Final answer
    x = 9,022.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.