Home / 13,639.82-20,445-6,604.94

Finding the Fourth Proportional to 13,639.82, 20,445 and 6,604.94

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Solution

The fourth proportional to 13,639.82, 20,445 and 6,604.94 is: 9,900.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.82 : 20,445 = 6,604.94 : x
  2. Step 2: Convert to fraction form
    13,639.82/20,445 = 6,604.94/x
  3. Step 3: Cross multiply
    13,639.82x = 20,445 × 6,604.94
  4. Step 4: Simplify right side
    13,639.82x = 135,037,998.30
  5. Step 5: Solve for x
    x = 135,037,998.30/13,639.82
  6. Step 6: Final answer
    x = 9,900.28

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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.