Home / 13,704.80-20,557.20-7,856.60

Finding the Fourth Proportional to 13,704.80, 20,557.20 and 7,856.60

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Solution

The fourth proportional to 13,704.80, 20,557.20 and 7,856.60 is: 11,784.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,704.80 : 20,557.20 = 7,856.60 : x
  2. Step 2: Convert to fraction form
    13,704.80/20,557.20 = 7,856.60/x
  3. Step 3: Cross multiply
    13,704.80x = 20,557.20 × 7,856.60
  4. Step 4: Simplify right side
    13,704.80x = 161,509,697.52
  5. Step 5: Solve for x
    x = 161,509,697.52/13,704.80
  6. Step 6: Final answer
    x = 11,784.90

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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.