Home / 20,800.82-31,219.76-9,713.64

Finding the Fourth Proportional to 20,800.82, 31,219.76 and 9,713.64

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Solution

The fourth proportional to 20,800.82, 31,219.76 and 9,713.64 is: 14,579.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800.82 : 31,219.76 = 9,713.64 : x
  2. Step 2: Convert to fraction form
    20,800.82/31,219.76 = 9,713.64/x
  3. Step 3: Cross multiply
    20,800.82x = 31,219.76 × 9,713.64
  4. Step 4: Simplify right side
    20,800.82x = 303,257,460.96
  5. Step 5: Solve for x
    x = 303,257,460.96/20,800.82
  6. Step 6: Final answer
    x = 14,579.11

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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.