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Finding the Fourth Proportional to 18,824.54, 28,249.77 and 7,137.86

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Solution

The fourth proportional to 18,824.54, 28,249.77 and 7,137.86 is: 10,711.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,824.54 : 28,249.77 = 7,137.86 : x
  2. Step 2: Convert to fraction form
    18,824.54/28,249.77 = 7,137.86/x
  3. Step 3: Cross multiply
    18,824.54x = 28,249.77 × 7,137.86
  4. Step 4: Simplify right side
    18,824.54x = 201,642,903.29
  5. Step 5: Solve for x
    x = 201,642,903.29/18,824.54
  6. Step 6: Final answer
    x = 10,711.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.