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Finding the Fourth Proportional to 18,376.80, 27,565.20 and 12,847.20

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Solution

The fourth proportional to 18,376.80, 27,565.20 and 12,847.20 is: 19,270.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,376.80 : 27,565.20 = 12,847.20 : x
  2. Step 2: Convert to fraction form
    18,376.80/27,565.20 = 12,847.20/x
  3. Step 3: Cross multiply
    18,376.80x = 27,565.20 × 12,847.20
  4. Step 4: Simplify right side
    18,376.80x = 354,135,637.44
  5. Step 5: Solve for x
    x = 354,135,637.44/18,376.80
  6. Step 6: Final answer
    x = 19,270.80

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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.