Home / 39,887.98-55,044.69-21,738.86

Finding the Fourth Proportional to 39,887.98, 55,044.69 and 21,738.86

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Solution

The fourth proportional to 39,887.98, 55,044.69 and 21,738.86 is: 29,999.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,887.98 : 55,044.69 = 21,738.86 : x
  2. Step 2: Convert to fraction form
    39,887.98/55,044.69 = 21,738.86/x
  3. Step 3: Cross multiply
    39,887.98x = 55,044.69 × 21,738.86
  4. Step 4: Simplify right side
    39,887.98x = 1,196,608,809.65
  5. Step 5: Solve for x
    x = 1,196,608,809.65/39,887.98
  6. Step 6: Final answer
    x = 29,999.23

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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.