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Finding the Fourth Proportional to 18,919.17, 28,362.33 and 9,551.39

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Solution

The fourth proportional to 18,919.17, 28,362.33 and 9,551.39 is: 14,318.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,919.17 : 28,362.33 = 9,551.39 : x
  2. Step 2: Convert to fraction form
    18,919.17/28,362.33 = 9,551.39/x
  3. Step 3: Cross multiply
    18,919.17x = 28,362.33 × 9,551.39
  4. Step 4: Simplify right side
    18,919.17x = 270,899,533.33
  5. Step 5: Solve for x
    x = 270,899,533.33/18,919.17
  6. Step 6: Final answer
    x = 14,318.79

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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.