Home / 8,021.31-11,045.21-7,179.32

Finding the Fourth Proportional to 8,021.31, 11,045.21 and 7,179.32

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Solution

The fourth proportional to 8,021.31, 11,045.21 and 7,179.32 is: 9,885.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,021.31 : 11,045.21 = 7,179.32 : x
  2. Step 2: Convert to fraction form
    8,021.31/11,045.21 = 7,179.32/x
  3. Step 3: Cross multiply
    8,021.31x = 11,045.21 × 7,179.32
  4. Step 4: Simplify right side
    8,021.31x = 79,297,005.93
  5. Step 5: Solve for x
    x = 79,297,005.93/8,021.31
  6. Step 6: Final answer
    x = 9,885.79

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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.