Home / 8,485.05-11,720.19-6,519.72

Finding the Fourth Proportional to 8,485.05, 11,720.19 and 6,519.72

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Solution

The fourth proportional to 8,485.05, 11,720.19 and 6,519.72 is: 9,005.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,485.05 : 11,720.19 = 6,519.72 : x
  2. Step 2: Convert to fraction form
    8,485.05/11,720.19 = 6,519.72/x
  3. Step 3: Cross multiply
    8,485.05x = 11,720.19 × 6,519.72
  4. Step 4: Simplify right side
    8,485.05x = 76,412,357.15
  5. Step 5: Solve for x
    x = 76,412,357.15/8,485.05
  6. Step 6: Final answer
    x = 9,005.53

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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.