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Finding the Fourth Proportional to 5,740.90, 7,919.10 and 3,615.60

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Solution

The fourth proportional to 5,740.90, 7,919.10 and 3,615.60 is: 4,987.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,740.90 : 7,919.10 = 3,615.60 : x
  2. Step 2: Convert to fraction form
    5,740.90/7,919.10 = 3,615.60/x
  3. Step 3: Cross multiply
    5,740.90x = 7,919.10 × 3,615.60
  4. Step 4: Simplify right side
    5,740.90x = 28,632,297.96
  5. Step 5: Solve for x
    x = 28,632,297.96/5,740.90
  6. Step 6: Final answer
    x = 4,987.42

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1.5x scale

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.