Home / 20,998.86-28,977.92-12,045.79

Finding the Fourth Proportional to 20,998.86, 28,977.92 and 12,045.79

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Solution

The fourth proportional to 20,998.86, 28,977.92 and 12,045.79 is: 16,622.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,998.86 : 28,977.92 = 12,045.79 : x
  2. Step 2: Convert to fraction form
    20,998.86/28,977.92 = 12,045.79/x
  3. Step 3: Cross multiply
    20,998.86x = 28,977.92 × 12,045.79
  4. Step 4: Simplify right side
    20,998.86x = 349,061,794.07
  5. Step 5: Solve for x
    x = 349,061,794.07/20,998.86
  6. Step 6: Final answer
    x = 16,622.90

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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.