Home / 11,877.62-16,388.55-7,161.80

Finding the Fourth Proportional to 11,877.62, 16,388.55 and 7,161.80

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Solution

The fourth proportional to 11,877.62, 16,388.55 and 7,161.80 is: 9,881.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,877.62 : 16,388.55 = 7,161.80 : x
  2. Step 2: Convert to fraction form
    11,877.62/16,388.55 = 7,161.80/x
  3. Step 3: Cross multiply
    11,877.62x = 16,388.55 × 7,161.80
  4. Step 4: Simplify right side
    11,877.62x = 117,371,517.39
  5. Step 5: Solve for x
    x = 117,371,517.39/11,877.62
  6. Step 6: Final answer
    x = 9,881.74

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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.