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Finding the Fourth Proportional to 20,776.52, 28,674.05 and 11,702.18

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Solution

The fourth proportional to 20,776.52, 28,674.05 and 11,702.18 is: 16,150.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,776.52 : 28,674.05 = 11,702.18 : x
  2. Step 2: Convert to fraction form
    20,776.52/28,674.05 = 11,702.18/x
  3. Step 3: Cross multiply
    20,776.52x = 28,674.05 × 11,702.18
  4. Step 4: Simplify right side
    20,776.52x = 335,548,751.06
  5. Step 5: Solve for x
    x = 335,548,751.06/20,776.52
  6. Step 6: Final answer
    x = 16,150.39

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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.