Home / 39,043.72-53,879.96-21,138.26

Finding the Fourth Proportional to 39,043.72, 53,879.96 and 21,138.26

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Solution

The fourth proportional to 39,043.72, 53,879.96 and 21,138.26 is: 29,170.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,043.72 : 53,879.96 = 21,138.26 : x
  2. Step 2: Convert to fraction form
    39,043.72/53,879.96 = 21,138.26/x
  3. Step 3: Cross multiply
    39,043.72x = 53,879.96 × 21,138.26
  4. Step 4: Simplify right side
    39,043.72x = 1,138,928,603.27
  5. Step 5: Solve for x
    x = 1,138,928,603.27/39,043.72
  6. Step 6: Final answer
    x = 29,170.60

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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.