Home / 20,933.66-28,888.20-11,502.20

Finding the Fourth Proportional to 20,933.66, 28,888.20 and 11,502.20

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Solution

The fourth proportional to 20,933.66, 28,888.20 and 11,502.20 is: 15,872.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,933.66 : 28,888.20 = 11,502.20 : x
  2. Step 2: Convert to fraction form
    20,933.66/28,888.20 = 11,502.20/x
  3. Step 3: Cross multiply
    20,933.66x = 28,888.20 × 11,502.20
  4. Step 4: Simplify right side
    20,933.66x = 332,277,709.60
  5. Step 5: Solve for x
    x = 332,277,709.60/20,933.66
  6. Step 6: Final answer
    x = 15,872.90

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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.