Home / 11,431.20-17,146.80-8,839.20

Finding the Fourth Proportional to 11,431.20, 17,146.80 and 8,839.20

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Solution

The fourth proportional to 11,431.20, 17,146.80 and 8,839.20 is: 13,258.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,431.20 : 17,146.80 = 8,839.20 : x
  2. Step 2: Convert to fraction form
    11,431.20/17,146.80 = 8,839.20/x
  3. Step 3: Cross multiply
    11,431.20x = 17,146.80 × 8,839.20
  4. Step 4: Simplify right side
    11,431.20x = 151,563,994.56
  5. Step 5: Solve for x
    x = 151,563,994.56/11,431.20
  6. Step 6: Final answer
    x = 13,258.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.