Home / 13,815.52-20,729.40-7,240.14

Finding the Fourth Proportional to 13,815.52, 20,729.40 and 7,240.14

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Solution

The fourth proportional to 13,815.52, 20,729.40 and 7,240.14 is: 10,863.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,815.52 : 20,729.40 = 7,240.14 : x
  2. Step 2: Convert to fraction form
    13,815.52/20,729.40 = 7,240.14/x
  3. Step 3: Cross multiply
    13,815.52x = 20,729.40 × 7,240.14
  4. Step 4: Simplify right side
    13,815.52x = 150,083,758.12
  5. Step 5: Solve for x
    x = 150,083,758.12/13,815.52
  6. Step 6: Final answer
    x = 10,863.42

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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.