Home / 20,662.06-28,513.64-12,278.56

Finding the Fourth Proportional to 20,662.06, 28,513.64 and 12,278.56

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Solution

The fourth proportional to 20,662.06, 28,513.64 and 12,278.56 is: 16,944.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,662.06 : 28,513.64 = 12,278.56 : x
  2. Step 2: Convert to fraction form
    20,662.06/28,513.64 = 12,278.56/x
  3. Step 3: Cross multiply
    20,662.06x = 28,513.64 × 12,278.56
  4. Step 4: Simplify right side
    20,662.06x = 350,106,439.56
  5. Step 5: Solve for x
    x = 350,106,439.56/20,662.06
  6. Step 6: Final answer
    x = 16,944.41

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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.