Home / 20,509.96-28,300.44-11,555.42

Finding the Fourth Proportional to 20,509.96, 28,300.44 and 11,555.42

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Solution

The fourth proportional to 20,509.96, 28,300.44 and 11,555.42 is: 15,944.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,509.96 : 28,300.44 = 11,555.42 : x
  2. Step 2: Convert to fraction form
    20,509.96/28,300.44 = 11,555.42/x
  3. Step 3: Cross multiply
    20,509.96x = 28,300.44 × 11,555.42
  4. Step 4: Simplify right side
    20,509.96x = 327,023,470.38
  5. Step 5: Solve for x
    x = 327,023,470.38/20,509.96
  6. Step 6: Final answer
    x = 15,944.62

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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.