Home / 21,083.39-29,084.77-12,579.91

Finding the Fourth Proportional to 21,083.39, 29,084.77 and 12,579.91

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Solution

The fourth proportional to 21,083.39, 29,084.77 and 12,579.91 is: 17,354.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,083.39 : 29,084.77 = 12,579.91 : x
  2. Step 2: Convert to fraction form
    21,083.39/29,084.77 = 12,579.91/x
  3. Step 3: Cross multiply
    21,083.39x = 29,084.77 × 12,579.91
  4. Step 4: Simplify right side
    21,083.39x = 365,883,731.98
  5. Step 5: Solve for x
    x = 365,883,731.98/21,083.39
  6. Step 6: Final answer
    x = 17,354.12

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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.