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Finding the Fourth Proportional to 18,847.20, 28,270.80 and 18,674.40

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Solution

The fourth proportional to 18,847.20, 28,270.80 and 18,674.40 is: 28,011.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,847.20 : 28,270.80 = 18,674.40 : x
  2. Step 2: Convert to fraction form
    18,847.20/28,270.80 = 18,674.40/x
  3. Step 3: Cross multiply
    18,847.20x = 28,270.80 × 18,674.40
  4. Step 4: Simplify right side
    18,847.20x = 527,940,227.52
  5. Step 5: Solve for x
    x = 527,940,227.52/18,847.20
  6. Step 6: Final answer
    x = 28,011.60

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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.