Home / 21,631.58-29,856.99-12,205.61

Finding the Fourth Proportional to 21,631.58, 29,856.99 and 12,205.61

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Solution

The fourth proportional to 21,631.58, 29,856.99 and 12,205.61 is: 16,846.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,631.58 : 29,856.99 = 12,205.61 : x
  2. Step 2: Convert to fraction form
    21,631.58/29,856.99 = 12,205.61/x
  3. Step 3: Cross multiply
    21,631.58x = 29,856.99 × 12,205.61
  4. Step 4: Simplify right side
    21,631.58x = 364,422,775.71
  5. Step 5: Solve for x
    x = 364,422,775.71/21,631.58
  6. Step 6: Final answer
    x = 16,846.79

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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.