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Finding the Fourth Proportional to 21,676.76, 29,915.76 and 12,247.04

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Solution

The fourth proportional to 21,676.76, 29,915.76 and 12,247.04 is: 16,901.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,676.76 : 29,915.76 = 12,247.04 : x
  2. Step 2: Convert to fraction form
    21,676.76/29,915.76 = 12,247.04/x
  3. Step 3: Cross multiply
    21,676.76x = 29,915.76 × 12,247.04
  4. Step 4: Simplify right side
    21,676.76x = 366,379,509.35
  5. Step 5: Solve for x
    x = 366,379,509.35/21,676.76
  6. Step 6: Final answer
    x = 16,901.95

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1.5x scale

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.