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Finding the Fourth Proportional to 21,080.92, 29,087.08 and 12,579.16

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Solution

The fourth proportional to 21,080.92, 29,087.08 and 12,579.16 is: 17,356.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,080.92 : 29,087.08 = 12,579.16 : x
  2. Step 2: Convert to fraction form
    21,080.92/29,087.08 = 12,579.16/x
  3. Step 3: Cross multiply
    21,080.92x = 29,087.08 × 12,579.16
  4. Step 4: Simplify right side
    21,080.92x = 365,891,033.25
  5. Step 5: Solve for x
    x = 365,891,033.25/21,080.92
  6. Step 6: Final answer
    x = 17,356.50

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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.