Home / 21,745.24-30,008.82-12,315.76

Finding the Fourth Proportional to 21,745.24, 30,008.82 and 12,315.76

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Solution

The fourth proportional to 21,745.24, 30,008.82 and 12,315.76 is: 16,995.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,745.24 : 30,008.82 = 12,315.76 : x
  2. Step 2: Convert to fraction form
    21,745.24/30,008.82 = 12,315.76/x
  3. Step 3: Cross multiply
    21,745.24x = 30,008.82 × 12,315.76
  4. Step 4: Simplify right side
    21,745.24x = 369,581,425.00
  5. Step 5: Solve for x
    x = 369,581,425.00/21,745.24
  6. Step 6: Final answer
    x = 16,995.97

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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.