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Finding the Fourth Proportional to 18,927.03, 28,389.94 and 7,830.44

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Solution

The fourth proportional to 18,927.03, 28,389.94 and 7,830.44 is: 11,745.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,927.03 : 28,389.94 = 7,830.44 : x
  2. Step 2: Convert to fraction form
    18,927.03/28,389.94 = 7,830.44/x
  3. Step 3: Cross multiply
    18,927.03x = 28,389.94 × 7,830.44
  4. Step 4: Simplify right side
    18,927.03x = 222,305,666.71
  5. Step 5: Solve for x
    x = 222,305,666.71/18,927.03
  6. Step 6: Final answer
    x = 11,745.40

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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.