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Finding the Fourth Proportional to 15,330, 21,155.22 and 8,616.75

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Solution

The fourth proportional to 15,330, 21,155.22 and 8,616.75 is: 11,891.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,330 : 21,155.22 = 8,616.75 : x
  2. Step 2: Convert to fraction form
    15,330/21,155.22 = 8,616.75/x
  3. Step 3: Cross multiply
    15,330x = 21,155.22 × 8,616.75
  4. Step 4: Simplify right side
    15,330x = 182,289,241.94
  5. Step 5: Solve for x
    x = 182,289,241.94/15,330
  6. Step 6: Final answer
    x = 11,891.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.