Home / 13,704.48-20,556.40-7,856.80

Finding the Fourth Proportional to 13,704.48, 20,556.40 and 7,856.80

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Solution

The fourth proportional to 13,704.48, 20,556.40 and 7,856.80 is: 11,785.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,704.48 : 20,556.40 = 7,856.80 : x
  2. Step 2: Convert to fraction form
    13,704.48/20,556.40 = 7,856.80/x
  3. Step 3: Cross multiply
    13,704.48x = 20,556.40 × 7,856.80
  4. Step 4: Simplify right side
    13,704.48x = 161,507,523.52
  5. Step 5: Solve for x
    x = 161,507,523.52/13,704.48
  6. Step 6: Final answer
    x = 11,785.02

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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.