Home / 20,129.78-30,173.99-6,974.94

Finding the Fourth Proportional to 20,129.78, 30,173.99 and 6,974.94

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Solution

The fourth proportional to 20,129.78, 30,173.99 and 6,974.94 is: 10,455.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,129.78 : 30,173.99 = 6,974.94 : x
  2. Step 2: Convert to fraction form
    20,129.78/30,173.99 = 6,974.94/x
  3. Step 3: Cross multiply
    20,129.78x = 30,173.99 × 6,974.94
  4. Step 4: Simplify right side
    20,129.78x = 210,461,769.81
  5. Step 5: Solve for x
    x = 210,461,769.81/20,129.78
  6. Step 6: Final answer
    x = 10,455.24

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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.