Home / 13,815.58-20,729.50-7,240.20

Finding the Fourth Proportional to 13,815.58, 20,729.50 and 7,240.20

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Solution

The fourth proportional to 13,815.58, 20,729.50 and 7,240.20 is: 10,863.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,815.58 : 20,729.50 = 7,240.20 : x
  2. Step 2: Convert to fraction form
    13,815.58/20,729.50 = 7,240.20/x
  3. Step 3: Cross multiply
    13,815.58x = 20,729.50 × 7,240.20
  4. Step 4: Simplify right side
    13,815.58x = 150,085,725.90
  5. Step 5: Solve for x
    x = 150,085,725.90/13,815.58
  6. Step 6: Final answer
    x = 10,863.51

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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.