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Finding the Fourth Proportional to 20,702.69, 28,568.09 and 11,751.68

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Solution

The fourth proportional to 20,702.69, 28,568.09 and 11,751.68 is: 16,216.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,702.69 : 28,568.09 = 11,751.68 : x
  2. Step 2: Convert to fraction form
    20,702.69/28,568.09 = 11,751.68/x
  3. Step 3: Cross multiply
    20,702.69x = 28,568.09 × 11,751.68
  4. Step 4: Simplify right side
    20,702.69x = 335,723,152.69
  5. Step 5: Solve for x
    x = 335,723,152.69/20,702.69
  6. Step 6: Final answer
    x = 16,216.40

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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.