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Finding the Fourth Proportional to 12,672.21, 17,483.37 and 8,201.61

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Solution

The fourth proportional to 12,672.21, 17,483.37 and 8,201.61 is: 11,315.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,672.21 : 17,483.37 = 8,201.61 : x
  2. Step 2: Convert to fraction form
    12,672.21/17,483.37 = 8,201.61/x
  3. Step 3: Cross multiply
    12,672.21x = 17,483.37 × 8,201.61
  4. Step 4: Simplify right side
    12,672.21x = 143,391,782.23
  5. Step 5: Solve for x
    x = 143,391,782.23/12,672.21
  6. Step 6: Final answer
    x = 11,315.45

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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.