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Finding the Fourth Proportional to 12,488.99, 18,732.87 and 4,169.88

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Solution

The fourth proportional to 12,488.99, 18,732.87 and 4,169.88 is: 6,254.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,488.99 : 18,732.87 = 4,169.88 : x
  2. Step 2: Convert to fraction form
    12,488.99/18,732.87 = 4,169.88/x
  3. Step 3: Cross multiply
    12,488.99x = 18,732.87 × 4,169.88
  4. Step 4: Simplify right side
    12,488.99x = 78,113,819.96
  5. Step 5: Solve for x
    x = 78,113,819.96/12,488.99
  6. Step 6: Final answer
    x = 6,254.62

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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.