Home / 13,635.18-20,449.72-5,315.42

Finding the Fourth Proportional to 13,635.18, 20,449.72 and 5,315.42

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Solution

The fourth proportional to 13,635.18, 20,449.72 and 5,315.42 is: 7,971.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,635.18 : 20,449.72 = 5,315.42 : x
  2. Step 2: Convert to fraction form
    13,635.18/20,449.72 = 5,315.42/x
  3. Step 3: Cross multiply
    13,635.18x = 20,449.72 × 5,315.42
  4. Step 4: Simplify right side
    13,635.18x = 108,698,850.68
  5. Step 5: Solve for x
    x = 108,698,850.68/13,635.18
  6. Step 6: Final answer
    x = 7,971.94

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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.