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Finding the Fourth Proportional to 28,556.73, 42,829.93 and 7,775.37

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Solution

The fourth proportional to 28,556.73, 42,829.93 and 7,775.37 is: 11,661.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,556.73 : 42,829.93 = 7,775.37 : x
  2. Step 2: Convert to fraction form
    28,556.73/42,829.93 = 7,775.37/x
  3. Step 3: Cross multiply
    28,556.73x = 42,829.93 × 7,775.37
  4. Step 4: Simplify right side
    28,556.73x = 333,018,552.82
  5. Step 5: Solve for x
    x = 333,018,552.82/28,556.73
  6. Step 6: Final answer
    x = 11,661.65

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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.