Home / 20,379.12-28,137.08-13,674.80

Finding the Fourth Proportional to 20,379.12, 28,137.08 and 13,674.80

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Solution

The fourth proportional to 20,379.12, 28,137.08 and 13,674.80 is: 18,880.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,379.12 : 28,137.08 = 13,674.80 : x
  2. Step 2: Convert to fraction form
    20,379.12/28,137.08 = 13,674.80/x
  3. Step 3: Cross multiply
    20,379.12x = 28,137.08 × 13,674.80
  4. Step 4: Simplify right side
    20,379.12x = 384,768,941.58
  5. Step 5: Solve for x
    x = 384,768,941.58/20,379.12
  6. Step 6: Final answer
    x = 18,880.55

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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.