Home / 20,289.90-30,438.09-6,961.38

Finding the Fourth Proportional to 20,289.90, 30,438.09 and 6,961.38

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Solution

The fourth proportional to 20,289.90, 30,438.09 and 6,961.38 is: 10,443.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,289.90 : 30,438.09 = 6,961.38 : x
  2. Step 2: Convert to fraction form
    20,289.90/30,438.09 = 6,961.38/x
  3. Step 3: Cross multiply
    20,289.90x = 30,438.09 × 6,961.38
  4. Step 4: Simplify right side
    20,289.90x = 211,891,110.96
  5. Step 5: Solve for x
    x = 211,891,110.96/20,289.90
  6. Step 6: Final answer
    x = 10,443.18

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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.