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Finding the Fourth Proportional to 19,305.64, 28,958.75 and 7,618.75

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Solution

The fourth proportional to 19,305.64, 28,958.75 and 7,618.75 is: 11,428.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,305.64 : 28,958.75 = 7,618.75 : x
  2. Step 2: Convert to fraction form
    19,305.64/28,958.75 = 7,618.75/x
  3. Step 3: Cross multiply
    19,305.64x = 28,958.75 × 7,618.75
  4. Step 4: Simplify right side
    19,305.64x = 220,629,476.56
  5. Step 5: Solve for x
    x = 220,629,476.56/19,305.64
  6. Step 6: Final answer
    x = 11,428.24

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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.