Home / 20,127.20-30,219.60-11,379.20

Finding the Fourth Proportional to 20,127.20, 30,219.60 and 11,379.20

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Solution

The fourth proportional to 20,127.20, 30,219.60 and 11,379.20 is: 17,085.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,127.20 : 30,219.60 = 11,379.20 : x
  2. Step 2: Convert to fraction form
    20,127.20/30,219.60 = 11,379.20/x
  3. Step 3: Cross multiply
    20,127.20x = 30,219.60 × 11,379.20
  4. Step 4: Simplify right side
    20,127.20x = 343,874,872.32
  5. Step 5: Solve for x
    x = 343,874,872.32/20,127.20
  6. Step 6: Final answer
    x = 17,085.08

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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.