Home / 38,965.80-53,769.60-21,969.12

Finding the Fourth Proportional to 38,965.80, 53,769.60 and 21,969.12

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Solution

The fourth proportional to 38,965.80, 53,769.60 and 21,969.12 is: 30,315.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,965.80 : 53,769.60 = 21,969.12 : x
  2. Step 2: Convert to fraction form
    38,965.80/53,769.60 = 21,969.12/x
  3. Step 3: Cross multiply
    38,965.80x = 53,769.60 × 21,969.12
  4. Step 4: Simplify right side
    38,965.80x = 1,181,270,794.75
  5. Step 5: Solve for x
    x = 1,181,270,794.75/38,965.80
  6. Step 6: Final answer
    x = 30,315.58

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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.