Home / 21,122.36-29,139.72-12,734

Finding the Fourth Proportional to 21,122.36, 29,139.72 and 12,734

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Solution

The fourth proportional to 21,122.36, 29,139.72 and 12,734 is: 17,567.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.36 : 29,139.72 = 12,734 : x
  2. Step 2: Convert to fraction form
    21,122.36/29,139.72 = 12,734/x
  3. Step 3: Cross multiply
    21,122.36x = 29,139.72 × 12,734
  4. Step 4: Simplify right side
    21,122.36x = 371,065,194.48
  5. Step 5: Solve for x
    x = 371,065,194.48/21,122.36
  6. Step 6: Final answer
    x = 17,567.41

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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.