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Finding the Fourth Proportional to 28,556.40, 42,837.80 and 8,834.80

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Solution

The fourth proportional to 28,556.40, 42,837.80 and 8,834.80 is: 13,253.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,556.40 : 42,837.80 = 8,834.80 : x
  2. Step 2: Convert to fraction form
    28,556.40/42,837.80 = 8,834.80/x
  3. Step 3: Cross multiply
    28,556.40x = 42,837.80 × 8,834.80
  4. Step 4: Simplify right side
    28,556.40x = 378,463,395.44
  5. Step 5: Solve for x
    x = 378,463,395.44/28,556.40
  6. Step 6: Final answer
    x = 13,253.19

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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.