Home / 13,979.12-20,963.60-7,658.70

Finding the Fourth Proportional to 13,979.12, 20,963.60 and 7,658.70

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Solution

The fourth proportional to 13,979.12, 20,963.60 and 7,658.70 is: 11,485.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.12 : 20,963.60 = 7,658.70 : x
  2. Step 2: Convert to fraction form
    13,979.12/20,963.60 = 7,658.70/x
  3. Step 3: Cross multiply
    13,979.12x = 20,963.60 × 7,658.70
  4. Step 4: Simplify right side
    13,979.12x = 160,553,923.32
  5. Step 5: Solve for x
    x = 160,553,923.32/13,979.12
  6. Step 6: Final answer
    x = 11,485.27

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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.