Home / 21,273.37-31,910.07-8,779.67

Finding the Fourth Proportional to 21,273.37, 31,910.07 and 8,779.67

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Solution

The fourth proportional to 21,273.37, 31,910.07 and 8,779.67 is: 13,169.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,273.37 : 31,910.07 = 8,779.67 : x
  2. Step 2: Convert to fraction form
    21,273.37/31,910.07 = 8,779.67/x
  3. Step 3: Cross multiply
    21,273.37x = 31,910.07 × 8,779.67
  4. Step 4: Simplify right side
    21,273.37x = 280,159,884.28
  5. Step 5: Solve for x
    x = 280,159,884.28/21,273.37
  6. Step 6: Final answer
    x = 13,169.51

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Similar ratio
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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.