Home / 11,405.70-15,740.25-6,369.99

Finding the Fourth Proportional to 11,405.70, 15,740.25 and 6,369.99

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Solution

The fourth proportional to 11,405.70, 15,740.25 and 6,369.99 is: 8,790.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,405.70 : 15,740.25 = 6,369.99 : x
  2. Step 2: Convert to fraction form
    11,405.70/15,740.25 = 6,369.99/x
  3. Step 3: Cross multiply
    11,405.70x = 15,740.25 × 6,369.99
  4. Step 4: Simplify right side
    11,405.70x = 100,265,235.10
  5. Step 5: Solve for x
    x = 100,265,235.10/11,405.70
  6. Step 6: Final answer
    x = 8,790.80

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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.