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Finding the Fourth Proportional to 12,891.54, 17,789.12 and 7,302.54

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Solution

The fourth proportional to 12,891.54, 17,789.12 and 7,302.54 is: 10,076.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,891.54 : 17,789.12 = 7,302.54 : x
  2. Step 2: Convert to fraction form
    12,891.54/17,789.12 = 7,302.54/x
  3. Step 3: Cross multiply
    12,891.54x = 17,789.12 × 7,302.54
  4. Step 4: Simplify right side
    12,891.54x = 129,905,760.36
  5. Step 5: Solve for x
    x = 129,905,760.36/12,891.54
  6. Step 6: Final answer
    x = 10,076.82

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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.