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Finding the Fourth Proportional to 11,412.59, 17,120.25 and 4,390.97

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Solution

The fourth proportional to 11,412.59, 17,120.25 and 4,390.97 is: 6,586.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,412.59 : 17,120.25 = 4,390.97 : x
  2. Step 2: Convert to fraction form
    11,412.59/17,120.25 = 4,390.97/x
  3. Step 3: Cross multiply
    11,412.59x = 17,120.25 × 4,390.97
  4. Step 4: Simplify right side
    11,412.59x = 75,174,418.54
  5. Step 5: Solve for x
    x = 75,174,418.54/11,412.59
  6. Step 6: Final answer
    x = 6,586.98

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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.