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Finding the Fourth Proportional to 12,808.91, 19,211.20 and 3,572.75

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Solution

The fourth proportional to 12,808.91, 19,211.20 and 3,572.75 is: 5,358.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,808.91 : 19,211.20 = 3,572.75 : x
  2. Step 2: Convert to fraction form
    12,808.91/19,211.20 = 3,572.75/x
  3. Step 3: Cross multiply
    12,808.91x = 19,211.20 × 3,572.75
  4. Step 4: Simplify right side
    12,808.91x = 68,636,814.80
  5. Step 5: Solve for x
    x = 68,636,814.80/12,808.91
  6. Step 6: Final answer
    x = 5,358.52

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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.