Home / 28,821.40-43,232.10-17,128.60

Finding the Fourth Proportional to 28,821.40, 43,232.10 and 17,128.60

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Solution

The fourth proportional to 28,821.40, 43,232.10 and 17,128.60 is: 25,692.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,821.40 : 43,232.10 = 17,128.60 : x
  2. Step 2: Convert to fraction form
    28,821.40/43,232.10 = 17,128.60/x
  3. Step 3: Cross multiply
    28,821.40x = 43,232.10 × 17,128.60
  4. Step 4: Simplify right side
    28,821.40x = 740,505,348.06
  5. Step 5: Solve for x
    x = 740,505,348.06/28,821.40
  6. Step 6: Final answer
    x = 25,692.90

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Why These Related Problems?

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