Home / 21,530.13-32,288.88-8,379.36

Finding the Fourth Proportional to 21,530.13, 32,288.88 and 8,379.36

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Solution

The fourth proportional to 21,530.13, 32,288.88 and 8,379.36 is: 12,566.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,530.13 : 32,288.88 = 8,379.36 : x
  2. Step 2: Convert to fraction form
    21,530.13/32,288.88 = 8,379.36/x
  3. Step 3: Cross multiply
    21,530.13x = 32,288.88 × 8,379.36
  4. Step 4: Simplify right side
    21,530.13x = 270,560,149.52
  5. Step 5: Solve for x
    x = 270,560,149.52/21,530.13
  6. Step 6: Final answer
    x = 12,566.58

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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.