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Finding the Fourth Proportional to 18,464.86, 25,478.13 and 12,173.50

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Solution

The fourth proportional to 18,464.86, 25,478.13 and 12,173.50 is: 16,797.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,464.86 : 25,478.13 = 12,173.50 : x
  2. Step 2: Convert to fraction form
    18,464.86/25,478.13 = 12,173.50/x
  3. Step 3: Cross multiply
    18,464.86x = 25,478.13 × 12,173.50
  4. Step 4: Simplify right side
    18,464.86x = 310,158,015.56
  5. Step 5: Solve for x
    x = 310,158,015.56/18,464.86
  6. Step 6: Final answer
    x = 16,797.20

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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.