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Finding the Fourth Proportional to 12,876.55, 17,767.07 and 7,837.39

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Solution

The fourth proportional to 12,876.55, 17,767.07 and 7,837.39 is: 10,814.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,876.55 : 17,767.07 = 7,837.39 : x
  2. Step 2: Convert to fraction form
    12,876.55/17,767.07 = 7,837.39/x
  3. Step 3: Cross multiply
    12,876.55x = 17,767.07 × 7,837.39
  4. Step 4: Simplify right side
    12,876.55x = 139,247,456.75
  5. Step 5: Solve for x
    x = 139,247,456.75/12,876.55
  6. Step 6: Final answer
    x = 10,814.03

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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.