Home / 20,131.29-30,189.37-6,980.49

Finding the Fourth Proportional to 20,131.29, 30,189.37 and 6,980.49

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Solution

The fourth proportional to 20,131.29, 30,189.37 and 6,980.49 is: 10,468.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,131.29 : 30,189.37 = 6,980.49 : x
  2. Step 2: Convert to fraction form
    20,131.29/30,189.37 = 6,980.49/x
  3. Step 3: Cross multiply
    20,131.29x = 30,189.37 × 6,980.49
  4. Step 4: Simplify right side
    20,131.29x = 210,736,595.39
  5. Step 5: Solve for x
    x = 210,736,595.39/20,131.29
  6. Step 6: Final answer
    x = 10,468.11

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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.