Home / 39,043.29-53,879.77-21,138.31

Finding the Fourth Proportional to 39,043.29, 53,879.77 and 21,138.31

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Solution

The fourth proportional to 39,043.29, 53,879.77 and 21,138.31 is: 29,170.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,043.29 : 53,879.77 = 21,138.31 : x
  2. Step 2: Convert to fraction form
    39,043.29/53,879.77 = 21,138.31/x
  3. Step 3: Cross multiply
    39,043.29x = 53,879.77 × 21,138.31
  4. Step 4: Simplify right side
    39,043.29x = 1,138,927,280.99
  5. Step 5: Solve for x
    x = 1,138,927,280.99/39,043.29
  6. Step 6: Final answer
    x = 29,170.88

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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.