Home / 13,438.37-20,154.92-12,771.59

Finding the Fourth Proportional to 13,438.37, 20,154.92 and 12,771.59

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Solution

The fourth proportional to 13,438.37, 20,154.92 and 12,771.59 is: 19,154.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,438.37 : 20,154.92 = 12,771.59 : x
  2. Step 2: Convert to fraction form
    13,438.37/20,154.92 = 12,771.59/x
  3. Step 3: Cross multiply
    13,438.37x = 20,154.92 × 12,771.59
  4. Step 4: Simplify right side
    13,438.37x = 257,410,210.09
  5. Step 5: Solve for x
    x = 257,410,210.09/13,438.37
  6. Step 6: Final answer
    x = 19,154.88

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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.