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Finding the Fourth Proportional to 12,891.25, 17,789.93 and 7,302.25

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Solution

The fourth proportional to 12,891.25, 17,789.93 and 7,302.25 is: 10,077.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,891.25 : 17,789.93 = 7,302.25 : x
  2. Step 2: Convert to fraction form
    12,891.25/17,789.93 = 7,302.25/x
  3. Step 3: Cross multiply
    12,891.25x = 17,789.93 × 7,302.25
  4. Step 4: Simplify right side
    12,891.25x = 129,906,479.83
  5. Step 5: Solve for x
    x = 129,906,479.83/12,891.25
  6. Step 6: Final answer
    x = 10,077.11

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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.