Home / 13,961.20-20,934.60-5,191.60

Finding the Fourth Proportional to 13,961.20, 20,934.60 and 5,191.60

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Solution

The fourth proportional to 13,961.20, 20,934.60 and 5,191.60 is: 7,784.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,961.20 : 20,934.60 = 5,191.60 : x
  2. Step 2: Convert to fraction form
    13,961.20/20,934.60 = 5,191.60/x
  3. Step 3: Cross multiply
    13,961.20x = 20,934.60 × 5,191.60
  4. Step 4: Simplify right side
    13,961.20x = 108,684,069.36
  5. Step 5: Solve for x
    x = 108,684,069.36/13,961.20
  6. Step 6: Final answer
    x = 7,784.72

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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.