Home / 5,518.59-7,615.62-3,128.55

Finding the Fourth Proportional to 5,518.59, 7,615.62 and 3,128.55

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Solution

The fourth proportional to 5,518.59, 7,615.62 and 3,128.55 is: 4,317.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,518.59 : 7,615.62 = 3,128.55 : x
  2. Step 2: Convert to fraction form
    5,518.59/7,615.62 = 3,128.55/x
  3. Step 3: Cross multiply
    5,518.59x = 7,615.62 × 3,128.55
  4. Step 4: Simplify right side
    5,518.59x = 23,825,847.95
  5. Step 5: Solve for x
    x = 23,825,847.95/5,518.59
  6. Step 6: Final answer
    x = 4,317.38

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Half scale
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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.