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Finding the Fourth Proportional to 18,839.60, 28,262.64 and 7,752.32

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Solution

The fourth proportional to 18,839.60, 28,262.64 and 7,752.32 is: 11,629.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,839.60 : 28,262.64 = 7,752.32 : x
  2. Step 2: Convert to fraction form
    18,839.60/28,262.64 = 7,752.32/x
  3. Step 3: Cross multiply
    18,839.60x = 28,262.64 × 7,752.32
  4. Step 4: Simplify right side
    18,839.60x = 219,101,029.32
  5. Step 5: Solve for x
    x = 219,101,029.32/18,839.60
  6. Step 6: Final answer
    x = 11,629.81

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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.