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Finding the Fourth Proportional to 10,908.90, 15,045.75 and 9,234.90

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Solution

The fourth proportional to 10,908.90, 15,045.75 and 9,234.90 is: 12,736.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,908.90 : 15,045.75 = 9,234.90 : x
  2. Step 2: Convert to fraction form
    10,908.90/15,045.75 = 9,234.90/x
  3. Step 3: Cross multiply
    10,908.90x = 15,045.75 × 9,234.90
  4. Step 4: Simplify right side
    10,908.90x = 138,945,996.68
  5. Step 5: Solve for x
    x = 138,945,996.68/10,908.90
  6. Step 6: Final answer
    x = 12,736.94

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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.