Home / 20,128.07-30,193.73-6,980.56

Finding the Fourth Proportional to 20,128.07, 30,193.73 and 6,980.56

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Solution

The fourth proportional to 20,128.07, 30,193.73 and 6,980.56 is: 10,471.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.07 : 30,193.73 = 6,980.56 : x
  2. Step 2: Convert to fraction form
    20,128.07/30,193.73 = 6,980.56/x
  3. Step 3: Cross multiply
    20,128.07x = 30,193.73 × 6,980.56
  4. Step 4: Simplify right side
    20,128.07x = 210,769,143.89
  5. Step 5: Solve for x
    x = 210,769,143.89/20,128.07
  6. Step 6: Final answer
    x = 10,471.40

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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.