Home / 8,121.30-11,212.61-6,632.79

Finding the Fourth Proportional to 8,121.30, 11,212.61 and 6,632.79

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Solution

The fourth proportional to 8,121.30, 11,212.61 and 6,632.79 is: 9,157.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.30 : 11,212.61 = 6,632.79 : x
  2. Step 2: Convert to fraction form
    8,121.30/11,212.61 = 6,632.79/x
  3. Step 3: Cross multiply
    8,121.30x = 11,212.61 × 6,632.79
  4. Step 4: Simplify right side
    8,121.30x = 74,370,887.48
  5. Step 5: Solve for x
    x = 74,370,887.48/8,121.30
  6. Step 6: Final answer
    x = 9,157.51

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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.