Home / 20,662.11-30,991.01-10,128.06

Finding the Fourth Proportional to 20,662.11, 30,991.01 and 10,128.06

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Solution

The fourth proportional to 20,662.11, 30,991.01 and 10,128.06 is: 15,191.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,662.11 : 30,991.01 = 10,128.06 : x
  2. Step 2: Convert to fraction form
    20,662.11/30,991.01 = 10,128.06/x
  3. Step 3: Cross multiply
    20,662.11x = 30,991.01 × 10,128.06
  4. Step 4: Simplify right side
    20,662.11x = 313,878,758.10
  5. Step 5: Solve for x
    x = 313,878,758.10/20,662.11
  6. Step 6: Final answer
    x = 15,191.03

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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.