Home / 20,218.59-30,313.54-7,728.09

Finding the Fourth Proportional to 20,218.59, 30,313.54 and 7,728.09

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Solution

The fourth proportional to 20,218.59, 30,313.54 and 7,728.09 is: 11,586.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,218.59 : 30,313.54 = 7,728.09 : x
  2. Step 2: Convert to fraction form
    20,218.59/30,313.54 = 7,728.09/x
  3. Step 3: Cross multiply
    20,218.59x = 30,313.54 × 7,728.09
  4. Step 4: Simplify right side
    20,218.59x = 234,265,765.34
  5. Step 5: Solve for x
    x = 234,265,765.34/20,218.59
  6. Step 6: Final answer
    x = 11,586.65

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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.