Home / 13,515.24-20,272.62-4,281

Finding the Fourth Proportional to 13,515.24, 20,272.62 and 4,281

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Solution

The fourth proportional to 13,515.24, 20,272.62 and 4,281 is: 6,421.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,515.24 : 20,272.62 = 4,281 : x
  2. Step 2: Convert to fraction form
    13,515.24/20,272.62 = 4,281/x
  3. Step 3: Cross multiply
    13,515.24x = 20,272.62 × 4,281
  4. Step 4: Simplify right side
    13,515.24x = 86,787,086.22
  5. Step 5: Solve for x
    x = 86,787,086.22/13,515.24
  6. Step 6: Final answer
    x = 6,421.42

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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.