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Finding the Fourth Proportional to 28,452.96, 39,268.80 and 15,880.32

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Solution

The fourth proportional to 28,452.96, 39,268.80 and 15,880.32 is: 21,916.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,452.96 : 39,268.80 = 15,880.32 : x
  2. Step 2: Convert to fraction form
    28,452.96/39,268.80 = 15,880.32/x
  3. Step 3: Cross multiply
    28,452.96x = 39,268.80 × 15,880.32
  4. Step 4: Simplify right side
    28,452.96x = 623,601,110.02
  5. Step 5: Solve for x
    x = 623,601,110.02/28,452.96
  6. Step 6: Final answer
    x = 21,916.92

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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.