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Finding the Fourth Proportional to 8,947, 12,350.10 and 5,221

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Solution

The fourth proportional to 8,947, 12,350.10 and 5,221 is: 7,206.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,947 : 12,350.10 = 5,221 : x
  2. Step 2: Convert to fraction form
    8,947/12,350.10 = 5,221/x
  3. Step 3: Cross multiply
    8,947x = 12,350.10 × 5,221
  4. Step 4: Simplify right side
    8,947x = 64,479,872.10
  5. Step 5: Solve for x
    x = 64,479,872.10/8,947
  6. Step 6: Final answer
    x = 7,206.87

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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.