Home / 20,991.88-28,972.76-12,045.24

Finding the Fourth Proportional to 20,991.88, 28,972.76 and 12,045.24

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Solution

The fourth proportional to 20,991.88, 28,972.76 and 12,045.24 is: 16,624.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,991.88 : 28,972.76 = 12,045.24 : x
  2. Step 2: Convert to fraction form
    20,991.88/28,972.76 = 12,045.24/x
  3. Step 3: Cross multiply
    20,991.88x = 28,972.76 × 12,045.24
  4. Step 4: Simplify right side
    20,991.88x = 348,983,847.66
  5. Step 5: Solve for x
    x = 348,983,847.66/20,991.88
  6. Step 6: Final answer
    x = 16,624.71

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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.