Home / 20,619.96-30,928.82-12,723.98

Finding the Fourth Proportional to 20,619.96, 30,928.82 and 12,723.98

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Solution

The fourth proportional to 20,619.96, 30,928.82 and 12,723.98 is: 19,085.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.96 : 30,928.82 = 12,723.98 : x
  2. Step 2: Convert to fraction form
    20,619.96/30,928.82 = 12,723.98/x
  3. Step 3: Cross multiply
    20,619.96x = 30,928.82 × 12,723.98
  4. Step 4: Simplify right side
    20,619.96x = 393,537,687.10
  5. Step 5: Solve for x
    x = 393,537,687.10/20,619.96
  6. Step 6: Final answer
    x = 19,085.28

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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.