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Finding the Fourth Proportional to 35,679.80, 53,525.88 and 11,989.65

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Solution

The fourth proportional to 35,679.80, 53,525.88 and 11,989.65 is: 17,986.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,679.80 : 53,525.88 = 11,989.65 : x
  2. Step 2: Convert to fraction form
    35,679.80/53,525.88 = 11,989.65/x
  3. Step 3: Cross multiply
    35,679.80x = 53,525.88 × 11,989.65
  4. Step 4: Simplify right side
    35,679.80x = 641,756,767.86
  5. Step 5: Solve for x
    x = 641,756,767.86/35,679.80
  6. Step 6: Final answer
    x = 17,986.56

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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.