Home / 20,516.62-30,779.07-6,478.84

Finding the Fourth Proportional to 20,516.62, 30,779.07 and 6,478.84

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Solution

The fourth proportional to 20,516.62, 30,779.07 and 6,478.84 is: 9,719.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,516.62 : 30,779.07 = 6,478.84 : x
  2. Step 2: Convert to fraction form
    20,516.62/30,779.07 = 6,478.84/x
  3. Step 3: Cross multiply
    20,516.62x = 30,779.07 × 6,478.84
  4. Step 4: Simplify right side
    20,516.62x = 199,412,669.88
  5. Step 5: Solve for x
    x = 199,412,669.88/20,516.62
  6. Step 6: Final answer
    x = 9,719.57

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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.