Home / 8,639.24-12,936.98-5,342.34

Finding the Fourth Proportional to 8,639.24, 12,936.98 and 5,342.34

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Solution

The fourth proportional to 8,639.24, 12,936.98 and 5,342.34 is: 7,999.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.24 : 12,936.98 = 5,342.34 : x
  2. Step 2: Convert to fraction form
    8,639.24/12,936.98 = 5,342.34/x
  3. Step 3: Cross multiply
    8,639.24x = 12,936.98 × 5,342.34
  4. Step 4: Simplify right side
    8,639.24x = 69,113,745.73
  5. Step 5: Solve for x
    x = 69,113,745.73/8,639.24
  6. Step 6: Final answer
    x = 7,999.98

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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.