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Finding the Fourth Proportional to 11,490.21, 17,201.84 and 8,541.72

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Solution

The fourth proportional to 11,490.21, 17,201.84 and 8,541.72 is: 12,787.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,490.21 : 17,201.84 = 8,541.72 : x
  2. Step 2: Convert to fraction form
    11,490.21/17,201.84 = 8,541.72/x
  3. Step 3: Cross multiply
    11,490.21x = 17,201.84 × 8,541.72
  4. Step 4: Simplify right side
    11,490.21x = 146,933,258.06
  5. Step 5: Solve for x
    x = 146,933,258.06/11,490.21
  6. Step 6: Final answer
    x = 12,787.69

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1.5x scale

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.