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Finding the Fourth Proportional to 18,832.50, 28,249.29 and 4,981.50

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Solution

The fourth proportional to 18,832.50, 28,249.29 and 4,981.50 is: 7,472.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,832.50 : 28,249.29 = 4,981.50 : x
  2. Step 2: Convert to fraction form
    18,832.50/28,249.29 = 4,981.50/x
  3. Step 3: Cross multiply
    18,832.50x = 28,249.29 × 4,981.50
  4. Step 4: Simplify right side
    18,832.50x = 140,723,838.14
  5. Step 5: Solve for x
    x = 140,723,838.14/18,832.50
  6. Step 6: Final answer
    x = 7,472.39

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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.