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Finding the Fourth Proportional to 43,353.70, 65,042.70 and 21,167.80

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Solution

The fourth proportional to 43,353.70, 65,042.70 and 21,167.80 is: 31,757.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,353.70 : 65,042.70 = 21,167.80 : x
  2. Step 2: Convert to fraction form
    43,353.70/65,042.70 = 21,167.80/x
  3. Step 3: Cross multiply
    43,353.70x = 65,042.70 × 21,167.80
  4. Step 4: Simplify right side
    43,353.70x = 1,376,810,865.06
  5. Step 5: Solve for x
    x = 1,376,810,865.06/43,353.70
  6. Step 6: Final answer
    x = 31,757.63

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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.