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Finding the Fourth Proportional to 28,935.45, 43,388.82 and 9,211.45

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Solution

The fourth proportional to 28,935.45, 43,388.82 and 9,211.45 is: 13,812.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,935.45 : 43,388.82 = 9,211.45 : x
  2. Step 2: Convert to fraction form
    28,935.45/43,388.82 = 9,211.45/x
  3. Step 3: Cross multiply
    28,935.45x = 43,388.82 × 9,211.45
  4. Step 4: Simplify right side
    28,935.45x = 399,673,945.99
  5. Step 5: Solve for x
    x = 399,673,945.99/28,935.45
  6. Step 6: Final answer
    x = 13,812.61

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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.