Home / 9,306.78-12,843.09-5,115.03

Finding the Fourth Proportional to 9,306.78, 12,843.09 and 5,115.03

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Solution

The fourth proportional to 9,306.78, 12,843.09 and 5,115.03 is: 7,058.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,306.78 : 12,843.09 = 5,115.03 : x
  2. Step 2: Convert to fraction form
    9,306.78/12,843.09 = 5,115.03/x
  3. Step 3: Cross multiply
    9,306.78x = 12,843.09 × 5,115.03
  4. Step 4: Simplify right side
    9,306.78x = 65,692,790.64
  5. Step 5: Solve for x
    x = 65,692,790.64/9,306.78
  6. Step 6: Final answer
    x = 7,058.59

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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.