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Finding the Fourth Proportional to 28,850.94, 43,278.42 and 9,129.84

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Solution

The fourth proportional to 28,850.94, 43,278.42 and 9,129.84 is: 13,695.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,850.94 : 43,278.42 = 9,129.84 : x
  2. Step 2: Convert to fraction form
    28,850.94/43,278.42 = 9,129.84/x
  3. Step 3: Cross multiply
    28,850.94x = 43,278.42 × 9,129.84
  4. Step 4: Simplify right side
    28,850.94x = 395,125,050.05
  5. Step 5: Solve for x
    x = 395,125,050.05/28,850.94
  6. Step 6: Final answer
    x = 13,695.40

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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.