Home / 21,291.12-29,380.68-11,860.56

Finding the Fourth Proportional to 21,291.12, 29,380.68 and 11,860.56

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Solution

The fourth proportional to 21,291.12, 29,380.68 and 11,860.56 is: 16,366.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,291.12 : 29,380.68 = 11,860.56 : x
  2. Step 2: Convert to fraction form
    21,291.12/29,380.68 = 11,860.56/x
  3. Step 3: Cross multiply
    21,291.12x = 29,380.68 × 11,860.56
  4. Step 4: Simplify right side
    21,291.12x = 348,471,317.98
  5. Step 5: Solve for x
    x = 348,471,317.98/21,291.12
  6. Step 6: Final answer
    x = 16,366.98

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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.