Home / 13,981.34-20,975.61-4,120.30

Finding the Fourth Proportional to 13,981.34, 20,975.61 and 4,120.30

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Solution

The fourth proportional to 13,981.34, 20,975.61 and 4,120.30 is: 6,181.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,981.34 : 20,975.61 = 4,120.30 : x
  2. Step 2: Convert to fraction form
    13,981.34/20,975.61 = 4,120.30/x
  3. Step 3: Cross multiply
    13,981.34x = 20,975.61 × 4,120.30
  4. Step 4: Simplify right side
    13,981.34x = 86,425,805.88
  5. Step 5: Solve for x
    x = 86,425,805.88/13,981.34
  6. Step 6: Final answer
    x = 6,181.51

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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.