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Finding the Fourth Proportional to 28,093.70, 42,115.81 and 11,467.71

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Solution

The fourth proportional to 28,093.70, 42,115.81 and 11,467.71 is: 17,191.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,093.70 : 42,115.81 = 11,467.71 : x
  2. Step 2: Convert to fraction form
    28,093.70/42,115.81 = 11,467.71/x
  3. Step 3: Cross multiply
    28,093.70x = 42,115.81 × 11,467.71
  4. Step 4: Simplify right side
    28,093.70x = 482,971,895.50
  5. Step 5: Solve for x
    x = 482,971,895.50/28,093.70
  6. Step 6: Final answer
    x = 17,191.47

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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.