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Finding the Fourth Proportional to 11,890.77, 17,863.50 and 8,388.84

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Solution

The fourth proportional to 11,890.77, 17,863.50 and 8,388.84 is: 12,602.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,890.77 : 17,863.50 = 8,388.84 : x
  2. Step 2: Convert to fraction form
    11,890.77/17,863.50 = 8,388.84/x
  3. Step 3: Cross multiply
    11,890.77x = 17,863.50 × 8,388.84
  4. Step 4: Simplify right side
    11,890.77x = 149,854,043.34
  5. Step 5: Solve for x
    x = 149,854,043.34/11,890.77
  6. Step 6: Final answer
    x = 12,602.55

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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.