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Finding the Fourth Proportional to 11,487.70, 17,238.84 and 4,919.42

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Solution

The fourth proportional to 11,487.70, 17,238.84 and 4,919.42 is: 7,382.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,487.70 : 17,238.84 = 4,919.42 : x
  2. Step 2: Convert to fraction form
    11,487.70/17,238.84 = 4,919.42/x
  3. Step 3: Cross multiply
    11,487.70x = 17,238.84 × 4,919.42
  4. Step 4: Simplify right side
    11,487.70x = 84,805,094.27
  5. Step 5: Solve for x
    x = 84,805,094.27/11,487.70
  6. Step 6: Final answer
    x = 7,382.25

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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.