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Finding the Fourth Proportional to 43,213.89, 64,820.82 and 10,381.89

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Solution

The fourth proportional to 43,213.89, 64,820.82 and 10,381.89 is: 15,572.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,213.89 : 64,820.82 = 10,381.89 : x
  2. Step 2: Convert to fraction form
    43,213.89/64,820.82 = 10,381.89/x
  3. Step 3: Cross multiply
    43,213.89x = 64,820.82 × 10,381.89
  4. Step 4: Simplify right side
    43,213.89x = 672,962,622.95
  5. Step 5: Solve for x
    x = 672,962,622.95/43,213.89
  6. Step 6: Final answer
    x = 15,572.83

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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.