Home / 38,986.67-53,801.51-21,990.86

Finding the Fourth Proportional to 38,986.67, 53,801.51 and 21,990.86

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Solution

The fourth proportional to 38,986.67, 53,801.51 and 21,990.86 is: 30,347.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,986.67 : 53,801.51 = 21,990.86 : x
  2. Step 2: Convert to fraction form
    38,986.67/53,801.51 = 21,990.86/x
  3. Step 3: Cross multiply
    38,986.67x = 53,801.51 × 21,990.86
  4. Step 4: Simplify right side
    38,986.67x = 1,183,141,474.20
  5. Step 5: Solve for x
    x = 1,183,141,474.20/38,986.67
  6. Step 6: Final answer
    x = 30,347.33

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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.