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Finding the Fourth Proportional to 28,615.24, 39,493.08 and 15,871.24

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Solution

The fourth proportional to 28,615.24, 39,493.08 and 15,871.24 is: 21,904.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,615.24 : 39,493.08 = 15,871.24 : x
  2. Step 2: Convert to fraction form
    28,615.24/39,493.08 = 15,871.24/x
  3. Step 3: Cross multiply
    28,615.24x = 39,493.08 × 15,871.24
  4. Step 4: Simplify right side
    28,615.24x = 626,804,151.02
  5. Step 5: Solve for x
    x = 626,804,151.02/28,615.24
  6. Step 6: Final answer
    x = 21,904.56

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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.