Home / 13,781.46-19,022.71-8,115.76

Finding the Fourth Proportional to 13,781.46, 19,022.71 and 8,115.76

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Solution

The fourth proportional to 13,781.46, 19,022.71 and 8,115.76 is: 11,202.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,781.46 : 19,022.71 = 8,115.76 : x
  2. Step 2: Convert to fraction form
    13,781.46/19,022.71 = 8,115.76/x
  3. Step 3: Cross multiply
    13,781.46x = 19,022.71 × 8,115.76
  4. Step 4: Simplify right side
    13,781.46x = 154,383,748.91
  5. Step 5: Solve for x
    x = 154,383,748.91/13,781.46
  6. Step 6: Final answer
    x = 11,202.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.