Home / 13,979.21-20,969.60-5,659.02

Finding the Fourth Proportional to 13,979.21, 20,969.60 and 5,659.02

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Solution

The fourth proportional to 13,979.21, 20,969.60 and 5,659.02 is: 8,488.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.21 : 20,969.60 = 5,659.02 : x
  2. Step 2: Convert to fraction form
    13,979.21/20,969.60 = 5,659.02/x
  3. Step 3: Cross multiply
    13,979.21x = 20,969.60 × 5,659.02
  4. Step 4: Simplify right side
    13,979.21x = 118,667,357.50
  5. Step 5: Solve for x
    x = 118,667,357.50/13,979.21
  6. Step 6: Final answer
    x = 8,488.85

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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.