Home / 13,861.84-20,780.34-5,090.62

Finding the Fourth Proportional to 13,861.84, 20,780.34 and 5,090.62

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Solution

The fourth proportional to 13,861.84, 20,780.34 and 5,090.62 is: 7,631.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,861.84 : 20,780.34 = 5,090.62 : x
  2. Step 2: Convert to fraction form
    13,861.84/20,780.34 = 5,090.62/x
  3. Step 3: Cross multiply
    13,861.84x = 20,780.34 × 5,090.62
  4. Step 4: Simplify right side
    13,861.84x = 105,784,814.41
  5. Step 5: Solve for x
    x = 105,784,814.41/13,861.84
  6. Step 6: Final answer
    x = 7,631.37

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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.