Home / 39,768.40-54,879.63-21,863.23

Finding the Fourth Proportional to 39,768.40, 54,879.63 and 21,863.23

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Solution

The fourth proportional to 39,768.40, 54,879.63 and 21,863.23 is: 30,170.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,768.40 : 54,879.63 = 21,863.23 : x
  2. Step 2: Convert to fraction form
    39,768.40/54,879.63 = 21,863.23/x
  3. Step 3: Cross multiply
    39,768.40x = 54,879.63 × 21,863.23
  4. Step 4: Simplify right side
    39,768.40x = 1,199,845,973.00
  5. Step 5: Solve for x
    x = 1,199,845,973.00/39,768.40
  6. Step 6: Final answer
    x = 30,170.84

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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.