Home / 13,983.12-20,971.32-4,119.72

Finding the Fourth Proportional to 13,983.12, 20,971.32 and 4,119.72

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Solution

The fourth proportional to 13,983.12, 20,971.32 and 4,119.72 is: 6,178.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,983.12 : 20,971.32 = 4,119.72 : x
  2. Step 2: Convert to fraction form
    13,983.12/20,971.32 = 4,119.72/x
  3. Step 3: Cross multiply
    13,983.12x = 20,971.32 × 4,119.72
  4. Step 4: Simplify right side
    13,983.12x = 86,395,966.43
  5. Step 5: Solve for x
    x = 86,395,966.43/13,983.12
  6. Step 6: Final answer
    x = 6,178.59

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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.