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Finding the Fourth Proportional to 18,528.76, 27,784.72 and 7,993.80

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Solution

The fourth proportional to 18,528.76, 27,784.72 and 7,993.80 is: 11,987.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,528.76 : 27,784.72 = 7,993.80 : x
  2. Step 2: Convert to fraction form
    18,528.76/27,784.72 = 7,993.80/x
  3. Step 3: Cross multiply
    18,528.76x = 27,784.72 × 7,993.80
  4. Step 4: Simplify right side
    18,528.76x = 222,105,494.74
  5. Step 5: Solve for x
    x = 222,105,494.74/18,528.76
  6. Step 6: Final answer
    x = 11,987.07

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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.