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Finding the Fourth Proportional to 20,871.45, 28,803.71 and 11,440.41

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Solution

The fourth proportional to 20,871.45, 28,803.71 and 11,440.41 is: 15,788.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,871.45 : 28,803.71 = 11,440.41 : x
  2. Step 2: Convert to fraction form
    20,871.45/28,803.71 = 11,440.41/x
  3. Step 3: Cross multiply
    20,871.45x = 28,803.71 × 11,440.41
  4. Step 4: Simplify right side
    20,871.45x = 329,526,194.72
  5. Step 5: Solve for x
    x = 329,526,194.72/20,871.45
  6. Step 6: Final answer
    x = 15,788.37

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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.