Home / 15,819.05-21,830.36-8,745.47

Finding the Fourth Proportional to 15,819.05, 21,830.36 and 8,745.47

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Solution

The fourth proportional to 15,819.05, 21,830.36 and 8,745.47 is: 12,068.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,819.05 : 21,830.36 = 8,745.47 : x
  2. Step 2: Convert to fraction form
    15,819.05/21,830.36 = 8,745.47/x
  3. Step 3: Cross multiply
    15,819.05x = 21,830.36 × 8,745.47
  4. Step 4: Simplify right side
    15,819.05x = 190,916,736.65
  5. Step 5: Solve for x
    x = 190,916,736.65/15,819.05
  6. Step 6: Final answer
    x = 12,068.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.