Home / 20,742.32-28,616.26-12,770.70

Finding the Fourth Proportional to 20,742.32, 28,616.26 and 12,770.70

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Solution

The fourth proportional to 20,742.32, 28,616.26 and 12,770.70 is: 17,618.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742.32 : 28,616.26 = 12,770.70 : x
  2. Step 2: Convert to fraction form
    20,742.32/28,616.26 = 12,770.70/x
  3. Step 3: Cross multiply
    20,742.32x = 28,616.26 × 12,770.70
  4. Step 4: Simplify right side
    20,742.32x = 365,449,671.58
  5. Step 5: Solve for x
    x = 365,449,671.58/20,742.32
  6. Step 6: Final answer
    x = 17,618.55

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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.