Home / 9,209.78-12,709.58-5,230.97

Finding the Fourth Proportional to 9,209.78, 12,709.58 and 5,230.97

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Solution

The fourth proportional to 9,209.78, 12,709.58 and 5,230.97 is: 7,218.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,209.78 : 12,709.58 = 5,230.97 : x
  2. Step 2: Convert to fraction form
    9,209.78/12,709.58 = 5,230.97/x
  3. Step 3: Cross multiply
    9,209.78x = 12,709.58 × 5,230.97
  4. Step 4: Simplify right side
    9,209.78x = 66,483,431.69
  5. Step 5: Solve for x
    x = 66,483,431.69/9,209.78
  6. Step 6: Final answer
    x = 7,218.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.