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Finding the Fourth Proportional to 21,083.88, 31,601.97 and 8,600.67

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Solution

The fourth proportional to 21,083.88, 31,601.97 and 8,600.67 is: 12,891.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,083.88 : 31,601.97 = 8,600.67 : x
  2. Step 2: Convert to fraction form
    21,083.88/31,601.97 = 8,600.67/x
  3. Step 3: Cross multiply
    21,083.88x = 31,601.97 × 8,600.67
  4. Step 4: Simplify right side
    21,083.88x = 271,798,115.32
  5. Step 5: Solve for x
    x = 271,798,115.32/21,083.88
  6. Step 6: Final answer
    x = 12,891.28

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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.