Home / 13,921.78-20,845.72-10,889.59

Finding the Fourth Proportional to 13,921.78, 20,845.72 and 10,889.59

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Solution

The fourth proportional to 13,921.78, 20,845.72 and 10,889.59 is: 16,305.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,921.78 : 20,845.72 = 10,889.59 : x
  2. Step 2: Convert to fraction form
    13,921.78/20,845.72 = 10,889.59/x
  3. Step 3: Cross multiply
    13,921.78x = 20,845.72 × 10,889.59
  4. Step 4: Simplify right side
    13,921.78x = 227,001,344.05
  5. Step 5: Solve for x
    x = 227,001,344.05/13,921.78
  6. Step 6: Final answer
    x = 16,305.48

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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.