Home / 21,695.19-29,939.58-12,745.59

Finding the Fourth Proportional to 21,695.19, 29,939.58 and 12,745.59

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Solution

The fourth proportional to 21,695.19, 29,939.58 and 12,745.59 is: 17,589.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,695.19 : 29,939.58 = 12,745.59 : x
  2. Step 2: Convert to fraction form
    21,695.19/29,939.58 = 12,745.59/x
  3. Step 3: Cross multiply
    21,695.19x = 29,939.58 × 12,745.59
  4. Step 4: Simplify right side
    21,695.19x = 381,597,611.45
  5. Step 5: Solve for x
    x = 381,597,611.45/21,695.19
  6. Step 6: Final answer
    x = 17,589.04

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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.