Home / 11,405.90-15,740.43-6,369.92

Finding the Fourth Proportional to 11,405.90, 15,740.43 and 6,369.92

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Solution

The fourth proportional to 11,405.90, 15,740.43 and 6,369.92 is: 8,790.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,405.90 : 15,740.43 = 6,369.92 : x
  2. Step 2: Convert to fraction form
    11,405.90/15,740.43 = 6,369.92/x
  3. Step 3: Cross multiply
    11,405.90x = 15,740.43 × 6,369.92
  4. Step 4: Simplify right side
    11,405.90x = 100,265,279.87
  5. Step 5: Solve for x
    x = 100,265,279.87/11,405.90
  6. Step 6: Final answer
    x = 8,790.65

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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.