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Finding the Fourth Proportional to 18,719.70, 28,055.31 and 7,613.49

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Solution

The fourth proportional to 18,719.70, 28,055.31 and 7,613.49 is: 11,410.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,719.70 : 28,055.31 = 7,613.49 : x
  2. Step 2: Convert to fraction form
    18,719.70/28,055.31 = 7,613.49/x
  3. Step 3: Cross multiply
    18,719.70x = 28,055.31 × 7,613.49
  4. Step 4: Simplify right side
    18,719.70x = 213,598,704.90
  5. Step 5: Solve for x
    x = 213,598,704.90/18,719.70
  6. Step 6: Final answer
    x = 11,410.37

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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.