Home / 39,768.15-54,879.29-21,862.98

Finding the Fourth Proportional to 39,768.15, 54,879.29 and 21,862.98

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Solution

The fourth proportional to 39,768.15, 54,879.29 and 21,862.98 is: 30,170.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,768.15 : 54,879.29 = 21,862.98 : x
  2. Step 2: Convert to fraction form
    39,768.15/54,879.29 = 21,862.98/x
  3. Step 3: Cross multiply
    39,768.15x = 54,879.29 × 21,862.98
  4. Step 4: Simplify right side
    39,768.15x = 1,199,824,710.37
  5. Step 5: Solve for x
    x = 1,199,824,710.37/39,768.15
  6. Step 6: Final answer
    x = 30,170.49

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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.