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Finding the Fourth Proportional to 35,687.73, 53,518.65 and 11,988.21

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Solution

The fourth proportional to 35,687.73, 53,518.65 and 11,988.21 is: 17,977.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,687.73 : 53,518.65 = 11,988.21 : x
  2. Step 2: Convert to fraction form
    35,687.73/53,518.65 = 11,988.21/x
  3. Step 3: Cross multiply
    35,687.73x = 53,518.65 × 11,988.21
  4. Step 4: Simplify right side
    35,687.73x = 641,592,815.12
  5. Step 5: Solve for x
    x = 641,592,815.12/35,687.73
  6. Step 6: Final answer
    x = 17,977.97

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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.