Home / 21,977.87-30,333.83-13,479.75

Finding the Fourth Proportional to 21,977.87, 30,333.83 and 13,479.75

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Solution

The fourth proportional to 21,977.87, 30,333.83 and 13,479.75 is: 18,604.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,977.87 : 30,333.83 = 13,479.75 : x
  2. Step 2: Convert to fraction form
    21,977.87/30,333.83 = 13,479.75/x
  3. Step 3: Cross multiply
    21,977.87x = 30,333.83 × 13,479.75
  4. Step 4: Simplify right side
    21,977.87x = 408,892,377.54
  5. Step 5: Solve for x
    x = 408,892,377.54/21,977.87
  6. Step 6: Final answer
    x = 18,604.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.