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Finding the Fourth Proportional to 18,976.60, 28,464.90 and 17,680.60

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Solution

The fourth proportional to 18,976.60, 28,464.90 and 17,680.60 is: 26,520.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,976.60 : 28,464.90 = 17,680.60 : x
  2. Step 2: Convert to fraction form
    18,976.60/28,464.90 = 17,680.60/x
  3. Step 3: Cross multiply
    18,976.60x = 28,464.90 × 17,680.60
  4. Step 4: Simplify right side
    18,976.60x = 503,276,510.94
  5. Step 5: Solve for x
    x = 503,276,510.94/18,976.60
  6. Step 6: Final answer
    x = 26,520.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.