Home / 11,877.12-16,388.10-7,161.66

Finding the Fourth Proportional to 11,877.12, 16,388.10 and 7,161.66

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Solution

The fourth proportional to 11,877.12, 16,388.10 and 7,161.66 is: 9,881.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,877.12 : 16,388.10 = 7,161.66 : x
  2. Step 2: Convert to fraction form
    11,877.12/16,388.10 = 7,161.66/x
  3. Step 3: Cross multiply
    11,877.12x = 16,388.10 × 7,161.66
  4. Step 4: Simplify right side
    11,877.12x = 117,366,000.25
  5. Step 5: Solve for x
    x = 117,366,000.25/11,877.12
  6. Step 6: Final answer
    x = 9,881.69

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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.