Home / 39,220.38-54,123.18-21,991.60

Finding the Fourth Proportional to 39,220.38, 54,123.18 and 21,991.60

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Solution

The fourth proportional to 39,220.38, 54,123.18 and 21,991.60 is: 30,347.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,220.38 : 54,123.18 = 21,991.60 : x
  2. Step 2: Convert to fraction form
    39,220.38/54,123.18 = 21,991.60/x
  3. Step 3: Cross multiply
    39,220.38x = 54,123.18 × 21,991.60
  4. Step 4: Simplify right side
    39,220.38x = 1,190,255,054.67
  5. Step 5: Solve for x
    x = 1,190,255,054.67/39,220.38
  6. Step 6: Final answer
    x = 30,347.88

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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.