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Finding the Fourth Proportional to 11,917.84, 16,439.78 and 7,433.80

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Solution

The fourth proportional to 11,917.84, 16,439.78 and 7,433.80 is: 10,254.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,917.84 : 16,439.78 = 7,433.80 : x
  2. Step 2: Convert to fraction form
    11,917.84/16,439.78 = 7,433.80/x
  3. Step 3: Cross multiply
    11,917.84x = 16,439.78 × 7,433.80
  4. Step 4: Simplify right side
    11,917.84x = 122,210,128.90
  5. Step 5: Solve for x
    x = 122,210,128.90/11,917.84
  6. Step 6: Final answer
    x = 10,254.39

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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.