Home / 20,790.74-28,689.62-11,836.46

Finding the Fourth Proportional to 20,790.74, 28,689.62 and 11,836.46

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Solution

The fourth proportional to 20,790.74, 28,689.62 and 11,836.46 is: 16,333.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.74 : 28,689.62 = 11,836.46 : x
  2. Step 2: Convert to fraction form
    20,790.74/28,689.62 = 11,836.46/x
  3. Step 3: Cross multiply
    20,790.74x = 28,689.62 × 11,836.46
  4. Step 4: Simplify right side
    20,790.74x = 339,583,336.91
  5. Step 5: Solve for x
    x = 339,583,336.91/20,790.74
  6. Step 6: Final answer
    x = 16,333.40

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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.