Home / 39,043.32-53,879.81-21,138.34

Finding the Fourth Proportional to 39,043.32, 53,879.81 and 21,138.34

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Solution

The fourth proportional to 39,043.32, 53,879.81 and 21,138.34 is: 29,170.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,043.32 : 53,879.81 = 21,138.34 : x
  2. Step 2: Convert to fraction form
    39,043.32/53,879.81 = 21,138.34/x
  3. Step 3: Cross multiply
    39,043.32x = 53,879.81 × 21,138.34
  4. Step 4: Simplify right side
    39,043.32x = 1,138,929,661.06
  5. Step 5: Solve for x
    x = 1,138,929,661.06/39,043.32
  6. Step 6: Final answer
    x = 29,170.92

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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.