Home / 5,405.14-8,107.69-2,115.93

Finding the Fourth Proportional to 5,405.14, 8,107.69 and 2,115.93

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Solution

The fourth proportional to 5,405.14, 8,107.69 and 2,115.93 is: 3,173.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,405.14 : 8,107.69 = 2,115.93 : x
  2. Step 2: Convert to fraction form
    5,405.14/8,107.69 = 2,115.93/x
  3. Step 3: Cross multiply
    5,405.14x = 8,107.69 × 2,115.93
  4. Step 4: Simplify right side
    5,405.14x = 17,155,304.50
  5. Step 5: Solve for x
    x = 17,155,304.50/5,405.14
  6. Step 6: Final answer
    x = 3,173.89

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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.