Home / 39,033.16-53,865.74-21,128.31

Finding the Fourth Proportional to 39,033.16, 53,865.74 and 21,128.31

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Solution

The fourth proportional to 39,033.16, 53,865.74 and 21,128.31 is: 29,157.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,033.16 : 53,865.74 = 21,128.31 : x
  2. Step 2: Convert to fraction form
    39,033.16/53,865.74 = 21,128.31/x
  3. Step 3: Cross multiply
    39,033.16x = 53,865.74 × 21,128.31
  4. Step 4: Simplify right side
    39,033.16x = 1,138,092,105.92
  5. Step 5: Solve for x
    x = 1,138,092,105.92/39,033.16
  6. Step 6: Final answer
    x = 29,157.06

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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.