Home / 20,454.26-28,240.83-15,665.74

Finding the Fourth Proportional to 20,454.26, 28,240.83 and 15,665.74

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Solution

The fourth proportional to 20,454.26, 28,240.83 and 15,665.74 is: 21,629.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,454.26 : 28,240.83 = 15,665.74 : x
  2. Step 2: Convert to fraction form
    20,454.26/28,240.83 = 15,665.74/x
  3. Step 3: Cross multiply
    20,454.26x = 28,240.83 × 15,665.74
  4. Step 4: Simplify right side
    20,454.26x = 442,413,429.56
  5. Step 5: Solve for x
    x = 442,413,429.56/20,454.26
  6. Step 6: Final answer
    x = 21,629.41

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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.