Home / 11,171.03-15,411.73-6,390

Finding the Fourth Proportional to 11,171.03, 15,411.73 and 6,390

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Solution

The fourth proportional to 11,171.03, 15,411.73 and 6,390 is: 8,815.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,171.03 : 15,411.73 = 6,390 : x
  2. Step 2: Convert to fraction form
    11,171.03/15,411.73 = 6,390/x
  3. Step 3: Cross multiply
    11,171.03x = 15,411.73 × 6,390
  4. Step 4: Simplify right side
    11,171.03x = 98,480,922.75
  5. Step 5: Solve for x
    x = 98,480,922.75/11,171.03
  6. Step 6: Final answer
    x = 8,815.75

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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.