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Finding the Fourth Proportional to 28,477.35, 39,262.05 and 18,387.99

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Solution

The fourth proportional to 28,477.35, 39,262.05 and 18,387.99 is: 25,351.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,477.35 : 39,262.05 = 18,387.99 : x
  2. Step 2: Convert to fraction form
    28,477.35/39,262.05 = 18,387.99/x
  3. Step 3: Cross multiply
    28,477.35x = 39,262.05 × 18,387.99
  4. Step 4: Simplify right side
    28,477.35x = 721,950,182.78
  5. Step 5: Solve for x
    x = 721,950,182.78/28,477.35
  6. Step 6: Final answer
    x = 25,351.73

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