Home / 11,121.20-15,348.88-6,404.56

Finding the Fourth Proportional to 11,121.20, 15,348.88 and 6,404.56

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Solution

The fourth proportional to 11,121.20, 15,348.88 and 6,404.56 is: 8,839.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,121.20 : 15,348.88 = 6,404.56 : x
  2. Step 2: Convert to fraction form
    11,121.20/15,348.88 = 6,404.56/x
  3. Step 3: Cross multiply
    11,121.20x = 15,348.88 × 6,404.56
  4. Step 4: Simplify right side
    11,121.20x = 98,302,822.89
  5. Step 5: Solve for x
    x = 98,302,822.89/11,121.20
  6. Step 6: Final answer
    x = 8,839.23

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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.