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Finding the Fourth Proportional to 18,853.76, 28,297.04 and 12,287.31

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Solution

The fourth proportional to 18,853.76, 28,297.04 and 12,287.31 is: 18,441.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,853.76 : 28,297.04 = 12,287.31 : x
  2. Step 2: Convert to fraction form
    18,853.76/28,297.04 = 12,287.31/x
  3. Step 3: Cross multiply
    18,853.76x = 28,297.04 × 12,287.31
  4. Step 4: Simplify right side
    18,853.76x = 347,694,441.13
  5. Step 5: Solve for x
    x = 347,694,441.13/18,853.76
  6. Step 6: Final answer
    x = 18,441.65

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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.