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Finding the Fourth Proportional to 20,900.40, 28,841.67 and 11,468.36

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Solution

The fourth proportional to 20,900.40, 28,841.67 and 11,468.36 is: 15,825.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,900.40 : 28,841.67 = 11,468.36 : x
  2. Step 2: Convert to fraction form
    20,900.40/28,841.67 = 11,468.36/x
  3. Step 3: Cross multiply
    20,900.40x = 28,841.67 × 11,468.36
  4. Step 4: Simplify right side
    20,900.40x = 330,766,510.35
  5. Step 5: Solve for x
    x = 330,766,510.35/20,900.40
  6. Step 6: Final answer
    x = 15,825.85

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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.