Home / 39,857.10-55,005.28-21,952.10

Finding the Fourth Proportional to 39,857.10, 55,005.28 and 21,952.10

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Solution

The fourth proportional to 39,857.10, 55,005.28 and 21,952.10 is: 30,295.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,857.10 : 55,005.28 = 21,952.10 : x
  2. Step 2: Convert to fraction form
    39,857.10/55,005.28 = 21,952.10/x
  3. Step 3: Cross multiply
    39,857.10x = 55,005.28 × 21,952.10
  4. Step 4: Simplify right side
    39,857.10x = 1,207,481,407.09
  5. Step 5: Solve for x
    x = 1,207,481,407.09/39,857.10
  6. Step 6: Final answer
    x = 30,295.27

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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.