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Finding the Fourth Proportional to 28,682.40, 43,023.60 and 7,905.90

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Solution

The fourth proportional to 28,682.40, 43,023.60 and 7,905.90 is: 11,858.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,682.40 : 43,023.60 = 7,905.90 : x
  2. Step 2: Convert to fraction form
    28,682.40/43,023.60 = 7,905.90/x
  3. Step 3: Cross multiply
    28,682.40x = 43,023.60 × 7,905.90
  4. Step 4: Simplify right side
    28,682.40x = 340,140,279.24
  5. Step 5: Solve for x
    x = 340,140,279.24/28,682.40
  6. Step 6: Final answer
    x = 11,858.85

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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.