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Finding the Fourth Proportional to 11,914.76, 17,878.86 and 11,820.68

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Solution

The fourth proportional to 11,914.76, 17,878.86 and 11,820.68 is: 17,737.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,914.76 : 17,878.86 = 11,820.68 : x
  2. Step 2: Convert to fraction form
    11,914.76/17,878.86 = 11,820.68/x
  3. Step 3: Cross multiply
    11,914.76x = 17,878.86 × 11,820.68
  4. Step 4: Simplify right side
    11,914.76x = 211,340,282.82
  5. Step 5: Solve for x
    x = 211,340,282.82/11,914.76
  6. Step 6: Final answer
    x = 17,737.69

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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.