Home / 28,211.13-38,917.26-21,879.63

Finding the Fourth Proportional to 28,211.13, 38,917.26 and 21,879.63

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Solution

The fourth proportional to 28,211.13, 38,917.26 and 21,879.63 is: 30,182.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,211.13 : 38,917.26 = 21,879.63 : x
  2. Step 2: Convert to fraction form
    28,211.13/38,917.26 = 21,879.63/x
  3. Step 3: Cross multiply
    28,211.13x = 38,917.26 × 21,879.63
  4. Step 4: Simplify right side
    28,211.13x = 851,495,249.41
  5. Step 5: Solve for x
    x = 851,495,249.41/28,211.13
  6. Step 6: Final answer
    x = 30,182.95

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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.