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Finding the Fourth Proportional to 15,143.10, 20,905.02 and 11,732.46

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Solution

The fourth proportional to 15,143.10, 20,905.02 and 11,732.46 is: 16,196.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,143.10 : 20,905.02 = 11,732.46 : x
  2. Step 2: Convert to fraction form
    15,143.10/20,905.02 = 11,732.46/x
  3. Step 3: Cross multiply
    15,143.10x = 20,905.02 × 11,732.46
  4. Step 4: Simplify right side
    15,143.10x = 245,267,310.95
  5. Step 5: Solve for x
    x = 245,267,310.95/15,143.10
  6. Step 6: Final answer
    x = 16,196.64

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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.