Home / 20,111.57-30,146.31-6,779.96

Finding the Fourth Proportional to 20,111.57, 30,146.31 and 6,779.96

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Solution

The fourth proportional to 20,111.57, 30,146.31 and 6,779.96 is: 10,162.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,111.57 : 30,146.31 = 6,779.96 : x
  2. Step 2: Convert to fraction form
    20,111.57/30,146.31 = 6,779.96/x
  3. Step 3: Cross multiply
    20,111.57x = 30,146.31 × 6,779.96
  4. Step 4: Simplify right side
    20,111.57x = 204,390,823.05
  5. Step 5: Solve for x
    x = 204,390,823.05/20,111.57
  6. Step 6: Final answer
    x = 10,162.85

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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.