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Finding the Fourth Proportional to 28,563.21, 39,412.53 and 17,945.28

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Solution

The fourth proportional to 28,563.21, 39,412.53 and 17,945.28 is: 24,761.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,563.21 : 39,412.53 = 17,945.28 : x
  2. Step 2: Convert to fraction form
    28,563.21/39,412.53 = 17,945.28/x
  3. Step 3: Cross multiply
    28,563.21x = 39,412.53 × 17,945.28
  4. Step 4: Simplify right side
    28,563.21x = 707,268,886.36
  5. Step 5: Solve for x
    x = 707,268,886.36/28,563.21
  6. Step 6: Final answer
    x = 24,761.53

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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.