Home / 20,815.76-28,698.62-15,151.44

Finding the Fourth Proportional to 20,815.76, 28,698.62 and 15,151.44

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Solution

The fourth proportional to 20,815.76, 28,698.62 and 15,151.44 is: 20,889.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,815.76 : 28,698.62 = 15,151.44 : x
  2. Step 2: Convert to fraction form
    20,815.76/28,698.62 = 15,151.44/x
  3. Step 3: Cross multiply
    20,815.76x = 28,698.62 × 15,151.44
  4. Step 4: Simplify right side
    20,815.76x = 434,825,419.01
  5. Step 5: Solve for x
    x = 434,825,419.01/20,815.76
  6. Step 6: Final answer
    x = 20,889.24

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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.