Home / 15,745.86-21,730.28-8,672.29

Finding the Fourth Proportional to 15,745.86, 21,730.28 and 8,672.29

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Solution

The fourth proportional to 15,745.86, 21,730.28 and 8,672.29 is: 11,968.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,745.86 : 21,730.28 = 8,672.29 : x
  2. Step 2: Convert to fraction form
    15,745.86/21,730.28 = 8,672.29/x
  3. Step 3: Cross multiply
    15,745.86x = 21,730.28 × 8,672.29
  4. Step 4: Simplify right side
    15,745.86x = 188,451,289.94
  5. Step 5: Solve for x
    x = 188,451,289.94/15,745.86
  6. Step 6: Final answer
    x = 11,968.31

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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.