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Finding the Fourth Proportional to 28,750.54, 43,119.32 and 7,975.66

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Solution

The fourth proportional to 28,750.54, 43,119.32 and 7,975.66 is: 11,961.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,750.54 : 43,119.32 = 7,975.66 : x
  2. Step 2: Convert to fraction form
    28,750.54/43,119.32 = 7,975.66/x
  3. Step 3: Cross multiply
    28,750.54x = 43,119.32 × 7,975.66
  4. Step 4: Simplify right side
    28,750.54x = 343,905,035.75
  5. Step 5: Solve for x
    x = 343,905,035.75/28,750.54
  6. Step 6: Final answer
    x = 11,961.69

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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.