Home / 21,021.39-31,532.07-7,879.95

Finding the Fourth Proportional to 21,021.39, 31,532.07 and 7,879.95

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Solution

The fourth proportional to 21,021.39, 31,532.07 and 7,879.95 is: 11,819.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021.39 : 31,532.07 = 7,879.95 : x
  2. Step 2: Convert to fraction form
    21,021.39/31,532.07 = 7,879.95/x
  3. Step 3: Cross multiply
    21,021.39x = 31,532.07 × 7,879.95
  4. Step 4: Simplify right side
    21,021.39x = 248,471,135.00
  5. Step 5: Solve for x
    x = 248,471,135.00/21,021.39
  6. Step 6: Final answer
    x = 11,819.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.