Home / 20,815.26-28,725.48-11,384.43

Finding the Fourth Proportional to 20,815.26, 28,725.48 and 11,384.43

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Solution

The fourth proportional to 20,815.26, 28,725.48 and 11,384.43 is: 15,710.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,815.26 : 28,725.48 = 11,384.43 : x
  2. Step 2: Convert to fraction form
    20,815.26/28,725.48 = 11,384.43/x
  3. Step 3: Cross multiply
    20,815.26x = 28,725.48 × 11,384.43
  4. Step 4: Simplify right side
    20,815.26x = 327,023,216.28
  5. Step 5: Solve for x
    x = 327,023,216.28/20,815.26
  6. Step 6: Final answer
    x = 15,710.74

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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.