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Finding the Fourth Proportional to 20,495.50, 28,249.78 and 14,519.50

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Solution

The fourth proportional to 20,495.50, 28,249.78 and 14,519.50 is: 20,012.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,495.50 : 28,249.78 = 14,519.50 : x
  2. Step 2: Convert to fraction form
    20,495.50/28,249.78 = 14,519.50/x
  3. Step 3: Cross multiply
    20,495.50x = 28,249.78 × 14,519.50
  4. Step 4: Simplify right side
    20,495.50x = 410,172,680.71
  5. Step 5: Solve for x
    x = 410,172,680.71/20,495.50
  6. Step 6: Final answer
    x = 20,012.82

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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.