Home / 20,728.05-28,603.34-11,654.80

Finding the Fourth Proportional to 20,728.05, 28,603.34 and 11,654.80

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Solution

The fourth proportional to 20,728.05, 28,603.34 and 11,654.80 is: 16,082.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.05 : 28,603.34 = 11,654.80 : x
  2. Step 2: Convert to fraction form
    20,728.05/28,603.34 = 11,654.80/x
  3. Step 3: Cross multiply
    20,728.05x = 28,603.34 × 11,654.80
  4. Step 4: Simplify right side
    20,728.05x = 333,366,148.76
  5. Step 5: Solve for x
    x = 333,366,148.76/20,728.05
  6. Step 6: Final answer
    x = 16,082.86

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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.