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Finding the Fourth Proportional to 28,678, 39,558.48 and 18,049.18

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Solution

The fourth proportional to 28,678, 39,558.48 and 18,049.18 is: 24,897.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,678 : 39,558.48 = 18,049.18 : x
  2. Step 2: Convert to fraction form
    28,678/39,558.48 = 18,049.18/x
  3. Step 3: Cross multiply
    28,678x = 39,558.48 × 18,049.18
  4. Step 4: Simplify right side
    28,678x = 713,998,126.05
  5. Step 5: Solve for x
    x = 713,998,126.05/28,678
  6. Step 6: Final answer
    x = 24,897.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.