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Finding the Fourth Proportional to 18,173.76, 25,079.64 and 11,463.72

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Solution

The fourth proportional to 18,173.76, 25,079.64 and 11,463.72 is: 15,819.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,173.76 : 25,079.64 = 11,463.72 : x
  2. Step 2: Convert to fraction form
    18,173.76/25,079.64 = 11,463.72/x
  3. Step 3: Cross multiply
    18,173.76x = 25,079.64 × 11,463.72
  4. Step 4: Simplify right side
    18,173.76x = 287,505,970.66
  5. Step 5: Solve for x
    x = 287,505,970.66/18,173.76
  6. Step 6: Final answer
    x = 15,819.84

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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.