Home / 20,692.32-28,568.88-13,630.74

Finding the Fourth Proportional to 20,692.32, 28,568.88 and 13,630.74

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Solution

The fourth proportional to 20,692.32, 28,568.88 and 13,630.74 is: 18,819.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,692.32 : 28,568.88 = 13,630.74 : x
  2. Step 2: Convert to fraction form
    20,692.32/28,568.88 = 13,630.74/x
  3. Step 3: Cross multiply
    20,692.32x = 28,568.88 × 13,630.74
  4. Step 4: Simplify right side
    20,692.32x = 389,414,975.37
  5. Step 5: Solve for x
    x = 389,414,975.37/20,692.32
  6. Step 6: Final answer
    x = 18,819.30

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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.