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Finding the Fourth Proportional to 19,160.86, 28,744.82 and 8,631.12

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Solution

The fourth proportional to 19,160.86, 28,744.82 and 8,631.12 is: 12,948.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,160.86 : 28,744.82 = 8,631.12 : x
  2. Step 2: Convert to fraction form
    19,160.86/28,744.82 = 8,631.12/x
  3. Step 3: Cross multiply
    19,160.86x = 28,744.82 × 8,631.12
  4. Step 4: Simplify right side
    19,160.86x = 248,099,990.80
  5. Step 5: Solve for x
    x = 248,099,990.80/19,160.86
  6. Step 6: Final answer
    x = 12,948.27

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Similar ratio
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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.