Home / 10,921.75-16,385.10-3,996.25

Finding the Fourth Proportional to 10,921.75, 16,385.10 and 3,996.25

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Solution

The fourth proportional to 10,921.75, 16,385.10 and 3,996.25 is: 5,995.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,921.75 : 16,385.10 = 3,996.25 : x
  2. Step 2: Convert to fraction form
    10,921.75/16,385.10 = 3,996.25/x
  3. Step 3: Cross multiply
    10,921.75x = 16,385.10 × 3,996.25
  4. Step 4: Simplify right side
    10,921.75x = 65,478,955.88
  5. Step 5: Solve for x
    x = 65,478,955.88/10,921.75
  6. Step 6: Final answer
    x = 5,995.28

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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.