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Finding the Fourth Proportional to 8,427.29, 12,640.93 and 7,907.87

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Solution

The fourth proportional to 8,427.29, 12,640.93 and 7,907.87 is: 11,861.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,427.29 : 12,640.93 = 7,907.87 : x
  2. Step 2: Convert to fraction form
    8,427.29/12,640.93 = 7,907.87/x
  3. Step 3: Cross multiply
    8,427.29x = 12,640.93 × 7,907.87
  4. Step 4: Simplify right side
    8,427.29x = 99,962,823.18
  5. Step 5: Solve for x
    x = 99,962,823.18/8,427.29
  6. Step 6: Final answer
    x = 11,861.81

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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.