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Finding the Fourth Proportional to 43,809.60, 65,713.43 and 12,218.82

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Solution

The fourth proportional to 43,809.60, 65,713.43 and 12,218.82 is: 18,327.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,809.60 : 65,713.43 = 12,218.82 : x
  2. Step 2: Convert to fraction form
    43,809.60/65,713.43 = 12,218.82/x
  3. Step 3: Cross multiply
    43,809.60x = 65,713.43 × 12,218.82
  4. Step 4: Simplify right side
    43,809.60x = 802,940,572.75
  5. Step 5: Solve for x
    x = 802,940,572.75/43,809.60
  6. Step 6: Final answer
    x = 18,327.96

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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.