Home / 20,470.24-28,245.60-11,516.56

Finding the Fourth Proportional to 20,470.24, 28,245.60 and 11,516.56

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Solution

The fourth proportional to 20,470.24, 28,245.60 and 11,516.56 is: 15,890.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,470.24 : 28,245.60 = 11,516.56 : x
  2. Step 2: Convert to fraction form
    20,470.24/28,245.60 = 11,516.56/x
  3. Step 3: Cross multiply
    20,470.24x = 28,245.60 × 11,516.56
  4. Step 4: Simplify right side
    20,470.24x = 325,292,147.14
  5. Step 5: Solve for x
    x = 325,292,147.14/20,470.24
  6. Step 6: Final answer
    x = 15,890.98

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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.