Home / 12,212.88-16,853.96-7,177.21

Finding the Fourth Proportional to 12,212.88, 16,853.96 and 7,177.21

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Solution

The fourth proportional to 12,212.88, 16,853.96 and 7,177.21 is: 9,904.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,212.88 : 16,853.96 = 7,177.21 : x
  2. Step 2: Convert to fraction form
    12,212.88/16,853.96 = 7,177.21/x
  3. Step 3: Cross multiply
    12,212.88x = 16,853.96 × 7,177.21
  4. Step 4: Simplify right side
    12,212.88x = 120,964,410.25
  5. Step 5: Solve for x
    x = 120,964,410.25/12,212.88
  6. Step 6: Final answer
    x = 9,904.66

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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.