Home / 12,030.32-16,618.66-11,399.78

Finding the Fourth Proportional to 12,030.32, 16,618.66 and 11,399.78

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Solution

The fourth proportional to 12,030.32, 16,618.66 and 11,399.78 is: 15,747.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,030.32 : 16,618.66 = 11,399.78 : x
  2. Step 2: Convert to fraction form
    12,030.32/16,618.66 = 11,399.78/x
  3. Step 3: Cross multiply
    12,030.32x = 16,618.66 × 11,399.78
  4. Step 4: Simplify right side
    12,030.32x = 189,449,067.89
  5. Step 5: Solve for x
    x = 189,449,067.89/12,030.32
  6. Step 6: Final answer
    x = 15,747.63

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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.