Home / 20,818.62-31,206.06-7,662.60

Finding the Fourth Proportional to 20,818.62, 31,206.06 and 7,662.60

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Solution

The fourth proportional to 20,818.62, 31,206.06 and 7,662.60 is: 11,485.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.62 : 31,206.06 = 7,662.60 : x
  2. Step 2: Convert to fraction form
    20,818.62/31,206.06 = 7,662.60/x
  3. Step 3: Cross multiply
    20,818.62x = 31,206.06 × 7,662.60
  4. Step 4: Simplify right side
    20,818.62x = 239,119,555.36
  5. Step 5: Solve for x
    x = 239,119,555.36/20,818.62
  6. Step 6: Final answer
    x = 11,485.85

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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.