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Finding the Fourth Proportional to 11,381.80, 17,072.70 and 3,590.68

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Solution

The fourth proportional to 11,381.80, 17,072.70 and 3,590.68 is: 5,386.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,381.80 : 17,072.70 = 3,590.68 : x
  2. Step 2: Convert to fraction form
    11,381.80/17,072.70 = 3,590.68/x
  3. Step 3: Cross multiply
    11,381.80x = 17,072.70 × 3,590.68
  4. Step 4: Simplify right side
    11,381.80x = 61,302,602.44
  5. Step 5: Solve for x
    x = 61,302,602.44/11,381.80
  6. Step 6: Final answer
    x = 5,386.02

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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.