Home / 20,966.21-28,933.91-11,406.69

Finding the Fourth Proportional to 20,966.21, 28,933.91 and 11,406.69

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Solution

The fourth proportional to 20,966.21, 28,933.91 and 11,406.69 is: 15,741.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,966.21 : 28,933.91 = 11,406.69 : x
  2. Step 2: Convert to fraction form
    20,966.21/28,933.91 = 11,406.69/x
  3. Step 3: Cross multiply
    20,966.21x = 28,933.91 × 11,406.69
  4. Step 4: Simplify right side
    20,966.21x = 330,040,141.86
  5. Step 5: Solve for x
    x = 330,040,141.86/20,966.21
  6. Step 6: Final answer
    x = 15,741.53

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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.