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Finding the Fourth Proportional to 18,777.59, 25,919.59 and 11,612.99

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Solution

The fourth proportional to 18,777.59, 25,919.59 and 11,612.99 is: 16,029.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,777.59 : 25,919.59 = 11,612.99 : x
  2. Step 2: Convert to fraction form
    18,777.59/25,919.59 = 11,612.99/x
  3. Step 3: Cross multiply
    18,777.59x = 25,919.59 × 11,612.99
  4. Step 4: Simplify right side
    18,777.59x = 301,003,809.88
  5. Step 5: Solve for x
    x = 301,003,809.88/18,777.59
  6. Step 6: Final answer
    x = 16,029.95

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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.