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Finding the Fourth Proportional to 28,750.78, 43,123.33 and 9,028.81

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Solution

The fourth proportional to 28,750.78, 43,123.33 and 9,028.81 is: 13,542.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,750.78 : 43,123.33 = 9,028.81 : x
  2. Step 2: Convert to fraction form
    28,750.78/43,123.33 = 9,028.81/x
  3. Step 3: Cross multiply
    28,750.78x = 43,123.33 × 9,028.81
  4. Step 4: Simplify right side
    28,750.78x = 389,352,353.14
  5. Step 5: Solve for x
    x = 389,352,353.14/28,750.78
  6. Step 6: Final answer
    x = 13,542.32

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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.