Home / 20,689.08-28,550.88-11,257.58

Finding the Fourth Proportional to 20,689.08, 28,550.88 and 11,257.58

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Solution

The fourth proportional to 20,689.08, 28,550.88 and 11,257.58 is: 15,535.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.08 : 28,550.88 = 11,257.58 : x
  2. Step 2: Convert to fraction form
    20,689.08/28,550.88 = 11,257.58/x
  3. Step 3: Cross multiply
    20,689.08x = 28,550.88 × 11,257.58
  4. Step 4: Simplify right side
    20,689.08x = 321,413,815.67
  5. Step 5: Solve for x
    x = 321,413,815.67/20,689.08
  6. Step 6: Final answer
    x = 15,535.43

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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.