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Finding the Fourth Proportional to 18,770.54, 28,151.60 and 5,621.22

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Solution

The fourth proportional to 18,770.54, 28,151.60 and 5,621.22 is: 8,430.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,770.54 : 28,151.60 = 5,621.22 : x
  2. Step 2: Convert to fraction form
    18,770.54/28,151.60 = 5,621.22/x
  3. Step 3: Cross multiply
    18,770.54x = 28,151.60 × 5,621.22
  4. Step 4: Simplify right side
    18,770.54x = 158,246,308.85
  5. Step 5: Solve for x
    x = 158,246,308.85/18,770.54
  6. Step 6: Final answer
    x = 8,430.57

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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.