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Finding the Fourth Proportional to 8,379.38, 12,506.37 and 8,240.99

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Solution

The fourth proportional to 8,379.38, 12,506.37 and 8,240.99 is: 12,299.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,379.38 : 12,506.37 = 8,240.99 : x
  2. Step 2: Convert to fraction form
    8,379.38/12,506.37 = 8,240.99/x
  3. Step 3: Cross multiply
    8,379.38x = 12,506.37 × 8,240.99
  4. Step 4: Simplify right side
    8,379.38x = 103,064,901.37
  5. Step 5: Solve for x
    x = 103,064,901.37/8,379.38
  6. Step 6: Final answer
    x = 12,299.82

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.