Home / 15,745.94-21,729.40-8,672.36

Finding the Fourth Proportional to 15,745.94, 21,729.40 and 8,672.36

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Solution

The fourth proportional to 15,745.94, 21,729.40 and 8,672.36 is: 11,967.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,745.94 : 21,729.40 = 8,672.36 : x
  2. Step 2: Convert to fraction form
    15,745.94/21,729.40 = 8,672.36/x
  3. Step 3: Cross multiply
    15,745.94x = 21,729.40 × 8,672.36
  4. Step 4: Simplify right side
    15,745.94x = 188,445,179.38
  5. Step 5: Solve for x
    x = 188,445,179.38/15,745.94
  6. Step 6: Final answer
    x = 11,967.86

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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.