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Finding the Fourth Proportional to 17,651.79, 26,477.34 and 7,121.61

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Solution

The fourth proportional to 17,651.79, 26,477.34 and 7,121.61 is: 10,682.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,651.79 : 26,477.34 = 7,121.61 : x
  2. Step 2: Convert to fraction form
    17,651.79/26,477.34 = 7,121.61/x
  3. Step 3: Cross multiply
    17,651.79x = 26,477.34 × 7,121.61
  4. Step 4: Simplify right side
    17,651.79x = 188,561,289.32
  5. Step 5: Solve for x
    x = 188,561,289.32/17,651.79
  6. Step 6: Final answer
    x = 10,682.28

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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.