Home / 38,986.56-53,801.37-21,990.75

Finding the Fourth Proportional to 38,986.56, 53,801.37 and 21,990.75

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Solution

The fourth proportional to 38,986.56, 53,801.37 and 21,990.75 is: 30,347.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,986.56 : 53,801.37 = 21,990.75 : x
  2. Step 2: Convert to fraction form
    38,986.56/53,801.37 = 21,990.75/x
  3. Step 3: Cross multiply
    38,986.56x = 53,801.37 × 21,990.75
  4. Step 4: Simplify right side
    38,986.56x = 1,183,132,477.33
  5. Step 5: Solve for x
    x = 1,183,132,477.33/38,986.56
  6. Step 6: Final answer
    x = 30,347.19

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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.