Home / 39,783.31-54,899.71-21,878.26

Finding the Fourth Proportional to 39,783.31, 54,899.71 and 21,878.26

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Solution

The fourth proportional to 39,783.31, 54,899.71 and 21,878.26 is: 30,191.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,783.31 : 54,899.71 = 21,878.26 : x
  2. Step 2: Convert to fraction form
    39,783.31/54,899.71 = 21,878.26/x
  3. Step 3: Cross multiply
    39,783.31x = 54,899.71 × 21,878.26
  4. Step 4: Simplify right side
    39,783.31x = 1,201,109,937.36
  5. Step 5: Solve for x
    x = 1,201,109,937.36/39,783.31
  6. Step 6: Final answer
    x = 30,191.30

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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.