Home / 39,021.78-53,850.05-21,116.78

Finding the Fourth Proportional to 39,021.78, 53,850.05 and 21,116.78

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Solution

The fourth proportional to 39,021.78, 53,850.05 and 21,116.78 is: 29,141.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,021.78 : 53,850.05 = 21,116.78 : x
  2. Step 2: Convert to fraction form
    39,021.78/53,850.05 = 21,116.78/x
  3. Step 3: Cross multiply
    39,021.78x = 53,850.05 × 21,116.78
  4. Step 4: Simplify right side
    39,021.78x = 1,137,139,846.26
  5. Step 5: Solve for x
    x = 1,137,139,846.26/39,021.78
  6. Step 6: Final answer
    x = 29,141.16

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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.