Home / 21,579.93-29,780.30-12,629.14

Finding the Fourth Proportional to 21,579.93, 29,780.30 and 12,629.14

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Solution

The fourth proportional to 21,579.93, 29,780.30 and 12,629.14 is: 17,428.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,579.93 : 29,780.30 = 12,629.14 : x
  2. Step 2: Convert to fraction form
    21,579.93/29,780.30 = 12,629.14/x
  3. Step 3: Cross multiply
    21,579.93x = 29,780.30 × 12,629.14
  4. Step 4: Simplify right side
    21,579.93x = 376,099,530.02
  5. Step 5: Solve for x
    x = 376,099,530.02/21,579.93
  6. Step 6: Final answer
    x = 17,428.21

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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.