Home / 21,102.97-29,121.74-11,671.53

Finding the Fourth Proportional to 21,102.97, 29,121.74 and 11,671.53

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Solution

The fourth proportional to 21,102.97, 29,121.74 and 11,671.53 is: 16,106.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,102.97 : 29,121.74 = 11,671.53 : x
  2. Step 2: Convert to fraction form
    21,102.97/29,121.74 = 11,671.53/x
  3. Step 3: Cross multiply
    21,102.97x = 29,121.74 × 11,671.53
  4. Step 4: Simplify right side
    21,102.97x = 339,895,262.06
  5. Step 5: Solve for x
    x = 339,895,262.06/21,102.97
  6. Step 6: Final answer
    x = 16,106.51

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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.