Home / 13,440.81-20,161.25-4,080.90

Finding the Fourth Proportional to 13,440.81, 20,161.25 and 4,080.90

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Solution

The fourth proportional to 13,440.81, 20,161.25 and 4,080.90 is: 6,121.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,440.81 : 20,161.25 = 4,080.90 : x
  2. Step 2: Convert to fraction form
    13,440.81/20,161.25 = 4,080.90/x
  3. Step 3: Cross multiply
    13,440.81x = 20,161.25 × 4,080.90
  4. Step 4: Simplify right side
    13,440.81x = 82,276,045.13
  5. Step 5: Solve for x
    x = 82,276,045.13/13,440.81
  6. Step 6: Final answer
    x = 6,121.36

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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.