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Finding the Fourth Proportional to 28,522.80, 42,832.80 and 18,705.60

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Solution

The fourth proportional to 28,522.80, 42,832.80 and 18,705.60 is: 28,090.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,522.80 : 42,832.80 = 18,705.60 : x
  2. Step 2: Convert to fraction form
    28,522.80/42,832.80 = 18,705.60/x
  3. Step 3: Cross multiply
    28,522.80x = 42,832.80 × 18,705.60
  4. Step 4: Simplify right side
    28,522.80x = 801,213,223.68
  5. Step 5: Solve for x
    x = 801,213,223.68/28,522.80
  6. Step 6: Final answer
    x = 28,090.27

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.