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Finding the Fourth Proportional to 14,245.42, 21,348.78 and 7,905.35

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Solution

The fourth proportional to 14,245.42, 21,348.78 and 7,905.35 is: 11,847.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,245.42 : 21,348.78 = 7,905.35 : x
  2. Step 2: Convert to fraction form
    14,245.42/21,348.78 = 7,905.35/x
  3. Step 3: Cross multiply
    14,245.42x = 21,348.78 × 7,905.35
  4. Step 4: Simplify right side
    14,245.42x = 168,769,577.97
  5. Step 5: Solve for x
    x = 168,769,577.97/14,245.42
  6. Step 6: Final answer
    x = 11,847.29

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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.