Home / 15,758.24-21,777.71-12,921.21

Finding the Fourth Proportional to 15,758.24, 21,777.71 and 12,921.21

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Solution

The fourth proportional to 15,758.24, 21,777.71 and 12,921.21 is: 17,856.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,758.24 : 21,777.71 = 12,921.21 : x
  2. Step 2: Convert to fraction form
    15,758.24/21,777.71 = 12,921.21/x
  3. Step 3: Cross multiply
    15,758.24x = 21,777.71 × 12,921.21
  4. Step 4: Simplify right side
    15,758.24x = 281,394,299.62
  5. Step 5: Solve for x
    x = 281,394,299.62/15,758.24
  6. Step 6: Final answer
    x = 17,856.97

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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.