Home / 39,043.37-53,879.87-21,138.36

Finding the Fourth Proportional to 39,043.37, 53,879.87 and 21,138.36

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Solution

The fourth proportional to 39,043.37, 53,879.87 and 21,138.36 is: 29,170.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,043.37 : 53,879.87 = 21,138.36 : x
  2. Step 2: Convert to fraction form
    39,043.37/53,879.87 = 21,138.36/x
  3. Step 3: Cross multiply
    39,043.37x = 53,879.87 × 21,138.36
  4. Step 4: Simplify right side
    39,043.37x = 1,138,931,983.12
  5. Step 5: Solve for x
    x = 1,138,931,983.12/39,043.37
  6. Step 6: Final answer
    x = 29,170.95

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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.