Home / 39,033.66-53,866.43-21,128.81

Finding the Fourth Proportional to 39,033.66, 53,866.43 and 21,128.81

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Solution

The fourth proportional to 39,033.66, 53,866.43 and 21,128.81 is: 29,157.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,033.66 : 53,866.43 = 21,128.81 : x
  2. Step 2: Convert to fraction form
    39,033.66/53,866.43 = 21,128.81/x
  3. Step 3: Cross multiply
    39,033.66x = 53,866.43 × 21,128.81
  4. Step 4: Simplify right side
    39,033.66x = 1,138,133,564.85
  5. Step 5: Solve for x
    x = 1,138,133,564.85/39,033.66
  6. Step 6: Final answer
    x = 29,157.75

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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.