Home / 21,879.91-30,194.26-12,930.63

Finding the Fourth Proportional to 21,879.91, 30,194.26 and 12,930.63

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Solution

The fourth proportional to 21,879.91, 30,194.26 and 12,930.63 is: 17,844.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,879.91 : 30,194.26 = 12,930.63 : x
  2. Step 2: Convert to fraction form
    21,879.91/30,194.26 = 12,930.63/x
  3. Step 3: Cross multiply
    21,879.91x = 30,194.26 × 12,930.63
  4. Step 4: Simplify right side
    21,879.91x = 390,430,804.18
  5. Step 5: Solve for x
    x = 390,430,804.18/21,879.91
  6. Step 6: Final answer
    x = 17,844.26

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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.