Home / 20,135.12-30,195.72-6,984.32

Finding the Fourth Proportional to 20,135.12, 30,195.72 and 6,984.32

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Solution

The fourth proportional to 20,135.12, 30,195.72 and 6,984.32 is: 10,474.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,135.12 : 30,195.72 = 6,984.32 : x
  2. Step 2: Convert to fraction form
    20,135.12/30,195.72 = 6,984.32/x
  3. Step 3: Cross multiply
    20,135.12x = 30,195.72 × 6,984.32
  4. Step 4: Simplify right side
    20,135.12x = 210,896,571.11
  5. Step 5: Solve for x
    x = 210,896,571.11/20,135.12
  6. Step 6: Final answer
    x = 10,474.07

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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.