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Finding the Fourth Proportional to 14,188.26, 21,267.60 and 7,939.11

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Solution

The fourth proportional to 14,188.26, 21,267.60 and 7,939.11 is: 11,900.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,188.26 : 21,267.60 = 7,939.11 : x
  2. Step 2: Convert to fraction form
    14,188.26/21,267.60 = 7,939.11/x
  3. Step 3: Cross multiply
    14,188.26x = 21,267.60 × 7,939.11
  4. Step 4: Simplify right side
    14,188.26x = 168,845,815.84
  5. Step 5: Solve for x
    x = 168,845,815.84/14,188.26
  6. Step 6: Final answer
    x = 11,900.39

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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.