Home / 21,239.04-29,310.62-11,679.65

Finding the Fourth Proportional to 21,239.04, 29,310.62 and 11,679.65

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Solution

The fourth proportional to 21,239.04, 29,310.62 and 11,679.65 is: 16,118.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,239.04 : 29,310.62 = 11,679.65 : x
  2. Step 2: Convert to fraction form
    21,239.04/29,310.62 = 11,679.65/x
  3. Step 3: Cross multiply
    21,239.04x = 29,310.62 × 11,679.65
  4. Step 4: Simplify right side
    21,239.04x = 342,337,885.36
  5. Step 5: Solve for x
    x = 342,337,885.36/21,239.04
  6. Step 6: Final answer
    x = 16,118.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.