Home / 20,978.03-31,467.05-17,272.47

Finding the Fourth Proportional to 20,978.03, 31,467.05 and 17,272.47

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Solution

The fourth proportional to 20,978.03, 31,467.05 and 17,272.47 is: 25,908.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,978.03 : 31,467.05 = 17,272.47 : x
  2. Step 2: Convert to fraction form
    20,978.03/31,467.05 = 17,272.47/x
  3. Step 3: Cross multiply
    20,978.03x = 31,467.05 × 17,272.47
  4. Step 4: Simplify right side
    20,978.03x = 543,513,590.75
  5. Step 5: Solve for x
    x = 543,513,590.75/20,978.03
  6. Step 6: Final answer
    x = 25,908.71

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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.