Home / 11,186.10-16,815.60-7,921.80

Finding the Fourth Proportional to 11,186.10, 16,815.60 and 7,921.80

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Solution

The fourth proportional to 11,186.10, 16,815.60 and 7,921.80 is: 11,908.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,186.10 : 16,815.60 = 7,921.80 : x
  2. Step 2: Convert to fraction form
    11,186.10/16,815.60 = 7,921.80/x
  3. Step 3: Cross multiply
    11,186.10x = 16,815.60 × 7,921.80
  4. Step 4: Simplify right side
    11,186.10x = 133,209,820.08
  5. Step 5: Solve for x
    x = 133,209,820.08/11,186.10
  6. Step 6: Final answer
    x = 11,908.51

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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.