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Finding the Fourth Proportional to 13,599.31, 18,768.92 and 7,631.33

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Solution

The fourth proportional to 13,599.31, 18,768.92 and 7,631.33 is: 10,532.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,599.31 : 18,768.92 = 7,631.33 : x
  2. Step 2: Convert to fraction form
    13,599.31/18,768.92 = 7,631.33/x
  3. Step 3: Cross multiply
    13,599.31x = 18,768.92 × 7,631.33
  4. Step 4: Simplify right side
    13,599.31x = 143,231,795.84
  5. Step 5: Solve for x
    x = 143,231,795.84/13,599.31
  6. Step 6: Final answer
    x = 10,532.28

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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.