Home / 20,380.37-28,124.42-11,427.84

Finding the Fourth Proportional to 20,380.37, 28,124.42 and 11,427.84

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Solution

The fourth proportional to 20,380.37, 28,124.42 and 11,427.84 is: 15,770.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,380.37 : 28,124.42 = 11,427.84 : x
  2. Step 2: Convert to fraction form
    20,380.37/28,124.42 = 11,427.84/x
  3. Step 3: Cross multiply
    20,380.37x = 28,124.42 × 11,427.84
  4. Step 4: Simplify right side
    20,380.37x = 321,401,314.71
  5. Step 5: Solve for x
    x = 321,401,314.71/20,380.37
  6. Step 6: Final answer
    x = 15,770.15

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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.