Home / 8,122.80-11,214.68-6,634.29

Finding the Fourth Proportional to 8,122.80, 11,214.68 and 6,634.29

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Solution

The fourth proportional to 8,122.80, 11,214.68 and 6,634.29 is: 9,159.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,122.80 : 11,214.68 = 6,634.29 : x
  2. Step 2: Convert to fraction form
    8,122.80/11,214.68 = 6,634.29/x
  3. Step 3: Cross multiply
    8,122.80x = 11,214.68 × 6,634.29
  4. Step 4: Simplify right side
    8,122.80x = 74,401,406.21
  5. Step 5: Solve for x
    x = 74,401,406.21/8,122.80
  6. Step 6: Final answer
    x = 9,159.58

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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.