Home / 13,975.80-20,966.40-4,115.40

Finding the Fourth Proportional to 13,975.80, 20,966.40 and 4,115.40

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Solution

The fourth proportional to 13,975.80, 20,966.40 and 4,115.40 is: 6,173.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,975.80 : 20,966.40 = 4,115.40 : x
  2. Step 2: Convert to fraction form
    13,975.80/20,966.40 = 4,115.40/x
  3. Step 3: Cross multiply
    13,975.80x = 20,966.40 × 4,115.40
  4. Step 4: Simplify right side
    13,975.80x = 86,285,122.56
  5. Step 5: Solve for x
    x = 86,285,122.56/13,975.80
  6. Step 6: Final answer
    x = 6,173.90

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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.