Home / 12,155.99-16,770.75-8,170.79

Finding the Fourth Proportional to 12,155.99, 16,770.75 and 8,170.79

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Solution

The fourth proportional to 12,155.99, 16,770.75 and 8,170.79 is: 11,272.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,155.99 : 16,770.75 = 8,170.79 : x
  2. Step 2: Convert to fraction form
    12,155.99/16,770.75 = 8,170.79/x
  3. Step 3: Cross multiply
    12,155.99x = 16,770.75 × 8,170.79
  4. Step 4: Simplify right side
    12,155.99x = 137,030,277.47
  5. Step 5: Solve for x
    x = 137,030,277.47/12,155.99
  6. Step 6: Final answer
    x = 11,272.65

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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.