Home / 20,958.75-28,921.32-12,343.56

Finding the Fourth Proportional to 20,958.75, 28,921.32 and 12,343.56

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Solution

The fourth proportional to 20,958.75, 28,921.32 and 12,343.56 is: 17,033.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,958.75 : 28,921.32 = 12,343.56 : x
  2. Step 2: Convert to fraction form
    20,958.75/28,921.32 = 12,343.56/x
  3. Step 3: Cross multiply
    20,958.75x = 28,921.32 × 12,343.56
  4. Step 4: Simplify right side
    20,958.75x = 356,992,048.70
  5. Step 5: Solve for x
    x = 356,992,048.70/20,958.75
  6. Step 6: Final answer
    x = 17,033.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.