Home / 20,790.10-28,689.69-11,838.88

Finding the Fourth Proportional to 20,790.10, 28,689.69 and 11,838.88

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Solution

The fourth proportional to 20,790.10, 28,689.69 and 11,838.88 is: 16,337.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.10 : 28,689.69 = 11,838.88 : x
  2. Step 2: Convert to fraction form
    20,790.10/28,689.69 = 11,838.88/x
  3. Step 3: Cross multiply
    20,790.10x = 28,689.69 × 11,838.88
  4. Step 4: Simplify right side
    20,790.10x = 339,653,797.15
  5. Step 5: Solve for x
    x = 339,653,797.15/20,790.10
  6. Step 6: Final answer
    x = 16,337.29

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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.