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Finding the Fourth Proportional to 12,579.95, 17,360.78 and 7,203.21

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Solution

The fourth proportional to 12,579.95, 17,360.78 and 7,203.21 is: 9,940.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,579.95 : 17,360.78 = 7,203.21 : x
  2. Step 2: Convert to fraction form
    12,579.95/17,360.78 = 7,203.21/x
  3. Step 3: Cross multiply
    12,579.95x = 17,360.78 × 7,203.21
  4. Step 4: Simplify right side
    12,579.95x = 125,053,308.09
  5. Step 5: Solve for x
    x = 125,053,308.09/12,579.95
  6. Step 6: Final answer
    x = 9,940.69

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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.