Home / 21,764.85-30,033.23-12,811.82

Finding the Fourth Proportional to 21,764.85, 30,033.23 and 12,811.82

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Solution

The fourth proportional to 21,764.85, 30,033.23 and 12,811.82 is: 17,678.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,764.85 : 30,033.23 = 12,811.82 : x
  2. Step 2: Convert to fraction form
    21,764.85/30,033.23 = 12,811.82/x
  3. Step 3: Cross multiply
    21,764.85x = 30,033.23 × 12,811.82
  4. Step 4: Simplify right side
    21,764.85x = 384,780,122.55
  5. Step 5: Solve for x
    x = 384,780,122.55/21,764.85
  6. Step 6: Final answer
    x = 17,678.97

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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.