Home / 13,983.78-20,971.50-4,122.84

Finding the Fourth Proportional to 13,983.78, 20,971.50 and 4,122.84

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Solution

The fourth proportional to 13,983.78, 20,971.50 and 4,122.84 is: 6,183.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,983.78 : 20,971.50 = 4,122.84 : x
  2. Step 2: Convert to fraction form
    13,983.78/20,971.50 = 4,122.84/x
  3. Step 3: Cross multiply
    13,983.78x = 20,971.50 × 4,122.84
  4. Step 4: Simplify right side
    13,983.78x = 86,462,139.06
  5. Step 5: Solve for x
    x = 86,462,139.06/13,983.78
  6. Step 6: Final answer
    x = 6,183.03

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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.