Home / 11,921.28-16,451.43-7,447.63

Finding the Fourth Proportional to 11,921.28, 16,451.43 and 7,447.63

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Solution

The fourth proportional to 11,921.28, 16,451.43 and 7,447.63 is: 10,277.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,921.28 : 16,451.43 = 7,447.63 : x
  2. Step 2: Convert to fraction form
    11,921.28/16,451.43 = 7,447.63/x
  3. Step 3: Cross multiply
    11,921.28x = 16,451.43 × 7,447.63
  4. Step 4: Simplify right side
    11,921.28x = 122,524,111.64
  5. Step 5: Solve for x
    x = 122,524,111.64/11,921.28
  6. Step 6: Final answer
    x = 10,277.77

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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.