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Finding the Fourth Proportional to 20,477.75, 28,259.15 and 11,525.09

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Solution

The fourth proportional to 20,477.75, 28,259.15 and 11,525.09 is: 15,904.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,477.75 : 28,259.15 = 11,525.09 : x
  2. Step 2: Convert to fraction form
    20,477.75/28,259.15 = 11,525.09/x
  3. Step 3: Cross multiply
    20,477.75x = 28,259.15 × 11,525.09
  4. Step 4: Simplify right side
    20,477.75x = 325,689,048.15
  5. Step 5: Solve for x
    x = 325,689,048.15/20,477.75
  6. Step 6: Final answer
    x = 15,904.54

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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.