Home / 21,220.32-31,826.37-20,166.60

Finding the Fourth Proportional to 21,220.32, 31,826.37 and 20,166.60

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Solution

The fourth proportional to 21,220.32, 31,826.37 and 20,166.60 is: 30,245.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,220.32 : 31,826.37 = 20,166.60 : x
  2. Step 2: Convert to fraction form
    21,220.32/31,826.37 = 20,166.60/x
  3. Step 3: Cross multiply
    21,220.32x = 31,826.37 × 20,166.60
  4. Step 4: Simplify right side
    21,220.32x = 641,829,673.24
  5. Step 5: Solve for x
    x = 641,829,673.24/21,220.32
  6. Step 6: Final answer
    x = 30,245.99

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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.