Home / 13,900.28-20,857.70-5,581.17

Finding the Fourth Proportional to 13,900.28, 20,857.70 and 5,581.17

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Solution

The fourth proportional to 13,900.28, 20,857.70 and 5,581.17 is: 8,374.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,900.28 : 20,857.70 = 5,581.17 : x
  2. Step 2: Convert to fraction form
    13,900.28/20,857.70 = 5,581.17/x
  3. Step 3: Cross multiply
    13,900.28x = 20,857.70 × 5,581.17
  4. Step 4: Simplify right side
    13,900.28x = 116,410,383.46
  5. Step 5: Solve for x
    x = 116,410,383.46/13,900.28
  6. Step 6: Final answer
    x = 8,374.68

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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.