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Finding the Fourth Proportional to 20,622, 28,465.44 and 13,903.32

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Solution

The fourth proportional to 20,622, 28,465.44 and 13,903.32 is: 19,191.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,622 : 28,465.44 = 13,903.32 : x
  2. Step 2: Convert to fraction form
    20,622/28,465.44 = 13,903.32/x
  3. Step 3: Cross multiply
    20,622x = 28,465.44 × 13,903.32
  4. Step 4: Simplify right side
    20,622x = 395,764,121.26
  5. Step 5: Solve for x
    x = 395,764,121.26/20,622
  6. Step 6: Final answer
    x = 19,191.35

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Why These Related Problems?

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