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Finding the Fourth Proportional to 11,855.70, 17,783.55 and 9,911.70

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Solution

The fourth proportional to 11,855.70, 17,783.55 and 9,911.70 is: 14,867.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,855.70 : 17,783.55 = 9,911.70 : x
  2. Step 2: Convert to fraction form
    11,855.70/17,783.55 = 9,911.70/x
  3. Step 3: Cross multiply
    11,855.70x = 17,783.55 × 9,911.70
  4. Step 4: Simplify right side
    11,855.70x = 176,265,212.54
  5. Step 5: Solve for x
    x = 176,265,212.54/11,855.70
  6. Step 6: Final answer
    x = 14,867.55

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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.