Home / 39,119.09-53,983.85-21,891.20

Finding the Fourth Proportional to 39,119.09, 53,983.85 and 21,891.20

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Solution

The fourth proportional to 39,119.09, 53,983.85 and 21,891.20 is: 30,209.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,119.09 : 53,983.85 = 21,891.20 : x
  2. Step 2: Convert to fraction form
    39,119.09/53,983.85 = 21,891.20/x
  3. Step 3: Cross multiply
    39,119.09x = 53,983.85 × 21,891.20
  4. Step 4: Simplify right side
    39,119.09x = 1,181,770,877.74
  5. Step 5: Solve for x
    x = 1,181,770,877.74/39,119.09
  6. Step 6: Final answer
    x = 30,209.57

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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.