Home / 20,790.41-28,690.88-11,838.56

Finding the Fourth Proportional to 20,790.41, 28,690.88 and 11,838.56

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Solution

The fourth proportional to 20,790.41, 28,690.88 and 11,838.56 is: 16,337.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.41 : 28,690.88 = 11,838.56 : x
  2. Step 2: Convert to fraction form
    20,790.41/28,690.88 = 11,838.56/x
  3. Step 3: Cross multiply
    20,790.41x = 28,690.88 × 11,838.56
  4. Step 4: Simplify right side
    20,790.41x = 339,658,501.69
  5. Step 5: Solve for x
    x = 339,658,501.69/20,790.41
  6. Step 6: Final answer
    x = 16,337.27

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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.