Home / 18,919.26-28,378.82-5,771.60

Finding the Fourth Proportional to 18,919.26, 28,378.82 and 5,771.60

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Solution

The fourth proportional to 18,919.26, 28,378.82 and 5,771.60 is: 8,657.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,919.26 : 28,378.82 = 5,771.60 : x
  2. Step 2: Convert to fraction form
    18,919.26/28,378.82 = 5,771.60/x
  3. Step 3: Cross multiply
    18,919.26x = 28,378.82 × 5,771.60
  4. Step 4: Simplify right side
    18,919.26x = 163,791,197.51
  5. Step 5: Solve for x
    x = 163,791,197.51/18,919.26
  6. Step 6: Final answer
    x = 8,657.38

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1.5x scale

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.