Home / 21,108-29,135.52-12,731.52

Finding the Fourth Proportional to 21,108, 29,135.52 and 12,731.52

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Solution

The fourth proportional to 21,108, 29,135.52 and 12,731.52 is: 17,573.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,108 : 29,135.52 = 12,731.52 : x
  2. Step 2: Convert to fraction form
    21,108/29,135.52 = 12,731.52/x
  3. Step 3: Cross multiply
    21,108x = 29,135.52 × 12,731.52
  4. Step 4: Simplify right side
    21,108x = 370,939,455.59
  5. Step 5: Solve for x
    x = 370,939,455.59/21,108
  6. Step 6: Final answer
    x = 17,573.41

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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.