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Finding the Fourth Proportional to 28,180.88, 38,890.83 and 15,605.63

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Solution

The fourth proportional to 28,180.88, 38,890.83 and 15,605.63 is: 21,536.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,180.88 : 38,890.83 = 15,605.63 : x
  2. Step 2: Convert to fraction form
    28,180.88/38,890.83 = 15,605.63/x
  3. Step 3: Cross multiply
    28,180.88x = 38,890.83 × 15,605.63
  4. Step 4: Simplify right side
    28,180.88x = 606,915,708.92
  5. Step 5: Solve for x
    x = 606,915,708.92/28,180.88
  6. Step 6: Final answer
    x = 21,536.44

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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.