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Finding the Fourth Proportional to 15,161.58, 20,923.16 and 8,447.60

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Solution

The fourth proportional to 15,161.58, 20,923.16 and 8,447.60 is: 11,657.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,161.58 : 20,923.16 = 8,447.60 : x
  2. Step 2: Convert to fraction form
    15,161.58/20,923.16 = 8,447.60/x
  3. Step 3: Cross multiply
    15,161.58x = 20,923.16 × 8,447.60
  4. Step 4: Simplify right side
    15,161.58x = 176,750,339.56
  5. Step 5: Solve for x
    x = 176,750,339.56/15,161.58
  6. Step 6: Final answer
    x = 11,657.78

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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.