Home / 13,975.70-20,920.35-8,114.90

Finding the Fourth Proportional to 13,975.70, 20,920.35 and 8,114.90

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Solution

The fourth proportional to 13,975.70, 20,920.35 and 8,114.90 is: 12,147.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,975.70 : 20,920.35 = 8,114.90 : x
  2. Step 2: Convert to fraction form
    13,975.70/20,920.35 = 8,114.90/x
  3. Step 3: Cross multiply
    13,975.70x = 20,920.35 × 8,114.90
  4. Step 4: Simplify right side
    13,975.70x = 169,766,548.22
  5. Step 5: Solve for x
    x = 169,766,548.22/13,975.70
  6. Step 6: Final answer
    x = 12,147.27

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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.