Home / 8,629.20-11,912.31-6,505.59

Finding the Fourth Proportional to 8,629.20, 11,912.31 and 6,505.59

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Solution

The fourth proportional to 8,629.20, 11,912.31 and 6,505.59 is: 8,980.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,629.20 : 11,912.31 = 6,505.59 : x
  2. Step 2: Convert to fraction form
    8,629.20/11,912.31 = 6,505.59/x
  3. Step 3: Cross multiply
    8,629.20x = 11,912.31 × 6,505.59
  4. Step 4: Simplify right side
    8,629.20x = 77,496,634.59
  5. Step 5: Solve for x
    x = 77,496,634.59/8,629.20
  6. Step 6: Final answer
    x = 8,980.74

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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.