Home / 20,145.28-27,800.80-11,193.62

Finding the Fourth Proportional to 20,145.28, 27,800.80 and 11,193.62

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Solution

The fourth proportional to 20,145.28, 27,800.80 and 11,193.62 is: 15,447.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,145.28 : 27,800.80 = 11,193.62 : x
  2. Step 2: Convert to fraction form
    20,145.28/27,800.80 = 11,193.62/x
  3. Step 3: Cross multiply
    20,145.28x = 27,800.80 × 11,193.62
  4. Step 4: Simplify right side
    20,145.28x = 311,191,590.90
  5. Step 5: Solve for x
    x = 311,191,590.90/20,145.28
  6. Step 6: Final answer
    x = 15,447.37

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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.