Home / 39,642.75-54,708.65-21,738.44

Finding the Fourth Proportional to 39,642.75, 54,708.65 and 21,738.44

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Solution

The fourth proportional to 39,642.75, 54,708.65 and 21,738.44 is: 29,999.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,642.75 : 54,708.65 = 21,738.44 : x
  2. Step 2: Convert to fraction form
    39,642.75/54,708.65 = 21,738.44/x
  3. Step 3: Cross multiply
    39,642.75x = 54,708.65 × 21,738.44
  4. Step 4: Simplify right side
    39,642.75x = 1,189,280,896.62
  5. Step 5: Solve for x
    x = 1,189,280,896.62/39,642.75
  6. Step 6: Final answer
    x = 29,999.96

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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.