Home / 20,731.86-28,604.84-12,663.44

Finding the Fourth Proportional to 20,731.86, 28,604.84 and 12,663.44

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Solution

The fourth proportional to 20,731.86, 28,604.84 and 12,663.44 is: 17,472.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.86 : 28,604.84 = 12,663.44 : x
  2. Step 2: Convert to fraction form
    20,731.86/28,604.84 = 12,663.44/x
  3. Step 3: Cross multiply
    20,731.86x = 28,604.84 × 12,663.44
  4. Step 4: Simplify right side
    20,731.86x = 362,235,675.05
  5. Step 5: Solve for x
    x = 362,235,675.05/20,731.86
  6. Step 6: Final answer
    x = 17,472.42

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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.