Home / 21,122.32-29,150.28-11,691.28

Finding the Fourth Proportional to 21,122.32, 29,150.28 and 11,691.28

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Solution

The fourth proportional to 21,122.32, 29,150.28 and 11,691.28 is: 16,134.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.32 : 29,150.28 = 11,691.28 : x
  2. Step 2: Convert to fraction form
    21,122.32/29,150.28 = 11,691.28/x
  3. Step 3: Cross multiply
    21,122.32x = 29,150.28 × 11,691.28
  4. Step 4: Simplify right side
    21,122.32x = 340,804,085.56
  5. Step 5: Solve for x
    x = 340,804,085.56/21,122.32
  6. Step 6: Final answer
    x = 16,134.78

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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.