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Finding the Fourth Proportional to 18,719, 28,078.37 and 7,623.08

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Solution

The fourth proportional to 18,719, 28,078.37 and 7,623.08 is: 11,434.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,719 : 28,078.37 = 7,623.08 : x
  2. Step 2: Convert to fraction form
    18,719/28,078.37 = 7,623.08/x
  3. Step 3: Cross multiply
    18,719x = 28,078.37 × 7,623.08
  4. Step 4: Simplify right side
    18,719x = 214,043,622.66
  5. Step 5: Solve for x
    x = 214,043,622.66/18,719
  6. Step 6: Final answer
    x = 11,434.57

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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.