Home / 39,783.97-54,903.30-21,880.36

Finding the Fourth Proportional to 39,783.97, 54,903.30 and 21,880.36

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Solution

The fourth proportional to 39,783.97, 54,903.30 and 21,880.36 is: 30,195.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,783.97 : 54,903.30 = 21,880.36 : x
  2. Step 2: Convert to fraction form
    39,783.97/54,903.30 = 21,880.36/x
  3. Step 3: Cross multiply
    39,783.97x = 54,903.30 × 21,880.36
  4. Step 4: Simplify right side
    39,783.97x = 1,201,303,969.19
  5. Step 5: Solve for x
    x = 1,201,303,969.19/39,783.97
  6. Step 6: Final answer
    x = 30,195.68

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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.