Home / 13,618.76-20,429.39-5,299.40

Finding the Fourth Proportional to 13,618.76, 20,429.39 and 5,299.40

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Solution

The fourth proportional to 13,618.76, 20,429.39 and 5,299.40 is: 7,949.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,618.76 : 20,429.39 = 5,299.40 : x
  2. Step 2: Convert to fraction form
    13,618.76/20,429.39 = 5,299.40/x
  3. Step 3: Cross multiply
    13,618.76x = 20,429.39 × 5,299.40
  4. Step 4: Simplify right side
    13,618.76x = 108,263,380.72
  5. Step 5: Solve for x
    x = 108,263,380.72/13,618.76
  6. Step 6: Final answer
    x = 7,949.58

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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.