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Finding the Fourth Proportional to 18,856.16, 28,290.16 and 7,768.08

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Solution

The fourth proportional to 18,856.16, 28,290.16 and 7,768.08 is: 11,654.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,856.16 : 28,290.16 = 7,768.08 : x
  2. Step 2: Convert to fraction form
    18,856.16/28,290.16 = 7,768.08/x
  3. Step 3: Cross multiply
    18,856.16x = 28,290.16 × 7,768.08
  4. Step 4: Simplify right side
    18,856.16x = 219,760,226.09
  5. Step 5: Solve for x
    x = 219,760,226.09/18,856.16
  6. Step 6: Final answer
    x = 11,654.56

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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.