Home / 15,745.08-21,729.51-8,672.82

Finding the Fourth Proportional to 15,745.08, 21,729.51 and 8,672.82

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Solution

The fourth proportional to 15,745.08, 21,729.51 and 8,672.82 is: 11,969.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,745.08 : 21,729.51 = 8,672.82 : x
  2. Step 2: Convert to fraction form
    15,745.08/21,729.51 = 8,672.82/x
  3. Step 3: Cross multiply
    15,745.08x = 21,729.51 × 8,672.82
  4. Step 4: Simplify right side
    15,745.08x = 188,456,128.92
  5. Step 5: Solve for x
    x = 188,456,128.92/15,745.08
  6. Step 6: Final answer
    x = 11,969.21

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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.