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Finding the Fourth Proportional to 15,107.76, 20,845.62 and 8,392.41

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Solution

The fourth proportional to 15,107.76, 20,845.62 and 8,392.41 is: 11,579.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,107.76 : 20,845.62 = 8,392.41 : x
  2. Step 2: Convert to fraction form
    15,107.76/20,845.62 = 8,392.41/x
  3. Step 3: Cross multiply
    15,107.76x = 20,845.62 × 8,392.41
  4. Step 4: Simplify right side
    15,107.76x = 174,944,989.74
  5. Step 5: Solve for x
    x = 174,944,989.74/15,107.76
  6. Step 6: Final answer
    x = 11,579.81

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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.