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Finding the Fourth Proportional to 11,855.70, 16,360.99 and 6,478.29

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Solution

The fourth proportional to 11,855.70, 16,360.99 and 6,478.29 is: 8,940.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,855.70 : 16,360.99 = 6,478.29 : x
  2. Step 2: Convert to fraction form
    11,855.70/16,360.99 = 6,478.29/x
  3. Step 3: Cross multiply
    11,855.70x = 16,360.99 × 6,478.29
  4. Step 4: Simplify right side
    11,855.70x = 105,991,221.71
  5. Step 5: Solve for x
    x = 105,991,221.71/11,855.70
  6. Step 6: Final answer
    x = 8,940.11

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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.