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Finding the Fourth Proportional to 15,155.91, 20,907.91 and 11,775.59

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Solution

The fourth proportional to 15,155.91, 20,907.91 and 11,775.59 is: 16,244.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,155.91 : 20,907.91 = 11,775.59 : x
  2. Step 2: Convert to fraction form
    15,155.91/20,907.91 = 11,775.59/x
  3. Step 3: Cross multiply
    15,155.91x = 20,907.91 × 11,775.59
  4. Step 4: Simplify right side
    15,155.91x = 246,202,975.92
  5. Step 5: Solve for x
    x = 246,202,975.92/15,155.91
  6. Step 6: Final answer
    x = 16,244.68

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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.