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Finding the Fourth Proportional to 28,906.80, 43,342.60 and 11,355.60

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Solution

The fourth proportional to 28,906.80, 43,342.60 and 11,355.60 is: 17,026.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,906.80 : 43,342.60 = 11,355.60 : x
  2. Step 2: Convert to fraction form
    28,906.80/43,342.60 = 11,355.60/x
  3. Step 3: Cross multiply
    28,906.80x = 43,342.60 × 11,355.60
  4. Step 4: Simplify right side
    28,906.80x = 492,181,228.56
  5. Step 5: Solve for x
    x = 492,181,228.56/28,906.80
  6. Step 6: Final answer
    x = 17,026.49

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1.5x scale

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.