Home / 27,556.73-38,028.68-20,645.65

Finding the Fourth Proportional to 27,556.73, 38,028.68 and 20,645.65

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Solution

The fourth proportional to 27,556.73, 38,028.68 and 20,645.65 is: 28,491.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,556.73 : 38,028.68 = 20,645.65 : x
  2. Step 2: Convert to fraction form
    27,556.73/38,028.68 = 20,645.65/x
  3. Step 3: Cross multiply
    27,556.73x = 38,028.68 × 20,645.65
  4. Step 4: Simplify right side
    27,556.73x = 785,126,817.24
  5. Step 5: Solve for x
    x = 785,126,817.24/27,556.73
  6. Step 6: Final answer
    x = 28,491.29

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Half scale
Find fourth proportional to 55,113.46, 76,057.36 and 41,291.30
Double scale
Find fourth proportional to 27,557.73, 38,030.06 and 20,646.65
Similar ratio
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1.5x scale

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.