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Finding the Fourth Proportional to 18,507.88, 25,540.44 and 11,340.60

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Solution

The fourth proportional to 18,507.88, 25,540.44 and 11,340.60 is: 15,649.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,507.88 : 25,540.44 = 11,340.60 : x
  2. Step 2: Convert to fraction form
    18,507.88/25,540.44 = 11,340.60/x
  3. Step 3: Cross multiply
    18,507.88x = 25,540.44 × 11,340.60
  4. Step 4: Simplify right side
    18,507.88x = 289,643,913.86
  5. Step 5: Solve for x
    x = 289,643,913.86/18,507.88
  6. Step 6: Final answer
    x = 15,649.76

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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.