Home / 20,118.20-30,206.10-11,370.20

Finding the Fourth Proportional to 20,118.20, 30,206.10 and 11,370.20

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Solution

The fourth proportional to 20,118.20, 30,206.10 and 11,370.20 is: 17,071.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,118.20 : 30,206.10 = 11,370.20 : x
  2. Step 2: Convert to fraction form
    20,118.20/30,206.10 = 11,370.20/x
  3. Step 3: Cross multiply
    20,118.20x = 30,206.10 × 11,370.20
  4. Step 4: Simplify right side
    20,118.20x = 343,449,398.22
  5. Step 5: Solve for x
    x = 343,449,398.22/20,118.20
  6. Step 6: Final answer
    x = 17,071.58

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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.