Home / 21,287.30-29,377.38-11,855.86

Finding the Fourth Proportional to 21,287.30, 29,377.38 and 11,855.86

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Solution

The fourth proportional to 21,287.30, 29,377.38 and 11,855.86 is: 16,361.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,287.30 : 29,377.38 = 11,855.86 : x
  2. Step 2: Convert to fraction form
    21,287.30/29,377.38 = 11,855.86/x
  3. Step 3: Cross multiply
    21,287.30x = 29,377.38 × 11,855.86
  4. Step 4: Simplify right side
    21,287.30x = 348,294,031.00
  5. Step 5: Solve for x
    x = 348,294,031.00/21,287.30
  6. Step 6: Final answer
    x = 16,361.59

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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.