Home / 11,391.84-15,721.68-6,675.12

Finding the Fourth Proportional to 11,391.84, 15,721.68 and 6,675.12

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Solution

The fourth proportional to 11,391.84, 15,721.68 and 6,675.12 is: 9,212.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,391.84 : 15,721.68 = 6,675.12 : x
  2. Step 2: Convert to fraction form
    11,391.84/15,721.68 = 6,675.12/x
  3. Step 3: Cross multiply
    11,391.84x = 15,721.68 × 6,675.12
  4. Step 4: Simplify right side
    11,391.84x = 104,944,100.60
  5. Step 5: Solve for x
    x = 104,944,100.60/11,391.84
  6. Step 6: Final answer
    x = 9,212.22

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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.