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Finding the Fourth Proportional to 7,185.40, 10,790.40 and 3,904.90

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Solution

The fourth proportional to 7,185.40, 10,790.40 and 3,904.90 is: 5,864.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,185.40 : 10,790.40 = 3,904.90 : x
  2. Step 2: Convert to fraction form
    7,185.40/10,790.40 = 3,904.90/x
  3. Step 3: Cross multiply
    7,185.40x = 10,790.40 × 3,904.90
  4. Step 4: Simplify right side
    7,185.40x = 42,135,432.96
  5. Step 5: Solve for x
    x = 42,135,432.96/7,185.40
  6. Step 6: Final answer
    x = 5,864.03

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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.