Home / 20,660.63-28,511.58-11,709.86

Finding the Fourth Proportional to 20,660.63, 28,511.58 and 11,709.86

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Solution

The fourth proportional to 20,660.63, 28,511.58 and 11,709.86 is: 16,159.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.63 : 28,511.58 = 11,709.86 : x
  2. Step 2: Convert to fraction form
    20,660.63/28,511.58 = 11,709.86/x
  3. Step 3: Cross multiply
    20,660.63x = 28,511.58 × 11,709.86
  4. Step 4: Simplify right side
    20,660.63x = 333,866,467.62
  5. Step 5: Solve for x
    x = 333,866,467.62/20,660.63
  6. Step 6: Final answer
    x = 16,159.55

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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.