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Finding the Fourth Proportional to 17,898.80, 26,826.60 and 9,129.20

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Solution

The fourth proportional to 17,898.80, 26,826.60 and 9,129.20 is: 13,682.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,898.80 : 26,826.60 = 9,129.20 : x
  2. Step 2: Convert to fraction form
    17,898.80/26,826.60 = 9,129.20/x
  3. Step 3: Cross multiply
    17,898.80x = 26,826.60 × 9,129.20
  4. Step 4: Simplify right side
    17,898.80x = 244,905,396.72
  5. Step 5: Solve for x
    x = 244,905,396.72/17,898.80
  6. Step 6: Final answer
    x = 13,682.78

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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.