Home / 21,336.09-31,923.95-20,211

Finding the Fourth Proportional to 21,336.09, 31,923.95 and 20,211

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Solution

The fourth proportional to 21,336.09, 31,923.95 and 20,211 is: 30,240.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,336.09 : 31,923.95 = 20,211 : x
  2. Step 2: Convert to fraction form
    21,336.09/31,923.95 = 20,211/x
  3. Step 3: Cross multiply
    21,336.09x = 31,923.95 × 20,211
  4. Step 4: Simplify right side
    21,336.09x = 645,214,852.40
  5. Step 5: Solve for x
    x = 645,214,852.40/21,336.09
  6. Step 6: Final answer
    x = 30,240.54

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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.