Home / 11,971.80-16,520.79-6,666.48

Finding the Fourth Proportional to 11,971.80, 16,520.79 and 6,666.48

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Solution

The fourth proportional to 11,971.80, 16,520.79 and 6,666.48 is: 9,199.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,971.80 : 16,520.79 = 6,666.48 : x
  2. Step 2: Convert to fraction form
    11,971.80/16,520.79 = 6,666.48/x
  3. Step 3: Cross multiply
    11,971.80x = 16,520.79 × 6,666.48
  4. Step 4: Simplify right side
    11,971.80x = 110,135,516.12
  5. Step 5: Solve for x
    x = 110,135,516.12/11,971.80
  6. Step 6: Final answer
    x = 9,199.58

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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.