Home / 20,431.36-30,643.36-5,636.61

Finding the Fourth Proportional to 20,431.36, 30,643.36 and 5,636.61

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Solution

The fourth proportional to 20,431.36, 30,643.36 and 5,636.61 is: 8,453.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,431.36 : 30,643.36 = 5,636.61 : x
  2. Step 2: Convert to fraction form
    20,431.36/30,643.36 = 5,636.61/x
  3. Step 3: Cross multiply
    20,431.36x = 30,643.36 × 5,636.61
  4. Step 4: Simplify right side
    20,431.36x = 172,724,669.41
  5. Step 5: Solve for x
    x = 172,724,669.41/20,431.36
  6. Step 6: Final answer
    x = 8,453.90

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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.