Home / 13,931.87-20,887.05-12,080.44

Finding the Fourth Proportional to 13,931.87, 20,887.05 and 12,080.44

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Solution

The fourth proportional to 13,931.87, 20,887.05 and 12,080.44 is: 18,111.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,931.87 : 20,887.05 = 12,080.44 : x
  2. Step 2: Convert to fraction form
    13,931.87/20,887.05 = 12,080.44/x
  3. Step 3: Cross multiply
    13,931.87x = 20,887.05 × 12,080.44
  4. Step 4: Simplify right side
    13,931.87x = 252,324,732.28
  5. Step 5: Solve for x
    x = 252,324,732.28/13,931.87
  6. Step 6: Final answer
    x = 18,111.33

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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.