Home / 28,730.57-43,078.23-11,858.33

Finding the Fourth Proportional to 28,730.57, 43,078.23 and 11,858.33

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Solution

The fourth proportional to 28,730.57, 43,078.23 and 11,858.33 is: 17,780.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,730.57 : 43,078.23 = 11,858.33 : x
  2. Step 2: Convert to fraction form
    28,730.57/43,078.23 = 11,858.33/x
  3. Step 3: Cross multiply
    28,730.57x = 43,078.23 × 11,858.33
  4. Step 4: Simplify right side
    28,730.57x = 510,835,974.85
  5. Step 5: Solve for x
    x = 510,835,974.85/28,730.57
  6. Step 6: Final answer
    x = 17,780.23

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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.