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Finding the Fourth Proportional to 15,353.08, 21,189.81 and 8,891.79

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Solution

The fourth proportional to 15,353.08, 21,189.81 and 8,891.79 is: 12,272.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,353.08 : 21,189.81 = 8,891.79 : x
  2. Step 2: Convert to fraction form
    15,353.08/21,189.81 = 8,891.79/x
  3. Step 3: Cross multiply
    15,353.08x = 21,189.81 × 8,891.79
  4. Step 4: Simplify right side
    15,353.08x = 188,415,190.25
  5. Step 5: Solve for x
    x = 188,415,190.25/15,353.08
  6. Step 6: Final answer
    x = 12,272.14

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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.