Home / 20,269.82-30,418.58-7,122.20

Finding the Fourth Proportional to 20,269.82, 30,418.58 and 7,122.20

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Solution

The fourth proportional to 20,269.82, 30,418.58 and 7,122.20 is: 10,688.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,269.82 : 30,418.58 = 7,122.20 : x
  2. Step 2: Convert to fraction form
    20,269.82/30,418.58 = 7,122.20/x
  3. Step 3: Cross multiply
    20,269.82x = 30,418.58 × 7,122.20
  4. Step 4: Simplify right side
    20,269.82x = 216,647,036.13
  5. Step 5: Solve for x
    x = 216,647,036.13/20,269.82
  6. Step 6: Final answer
    x = 10,688.16

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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.