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Finding the Fourth Proportional to 12,876.54, 17,771.85 and 7,287.54

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Solution

The fourth proportional to 12,876.54, 17,771.85 and 7,287.54 is: 10,058.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,876.54 : 17,771.85 = 7,287.54 : x
  2. Step 2: Convert to fraction form
    12,876.54/17,771.85 = 7,287.54/x
  3. Step 3: Cross multiply
    12,876.54x = 17,771.85 × 7,287.54
  4. Step 4: Simplify right side
    12,876.54x = 129,513,067.75
  5. Step 5: Solve for x
    x = 129,513,067.75/12,876.54
  6. Step 6: Final answer
    x = 10,058.06

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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.