Home / 20,640.83-28,483.25-11,689.92

Finding the Fourth Proportional to 20,640.83, 28,483.25 and 11,689.92

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Solution

The fourth proportional to 20,640.83, 28,483.25 and 11,689.92 is: 16,131.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.83 : 28,483.25 = 11,689.92 : x
  2. Step 2: Convert to fraction form
    20,640.83/28,483.25 = 11,689.92/x
  3. Step 3: Cross multiply
    20,640.83x = 28,483.25 × 11,689.92
  4. Step 4: Simplify right side
    20,640.83x = 332,966,855.39
  5. Step 5: Solve for x
    x = 332,966,855.39/20,640.83
  6. Step 6: Final answer
    x = 16,131.47

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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.