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Finding the Fourth Proportional to 15,747.76, 21,732.18 and 8,674.12

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Solution

The fourth proportional to 15,747.76, 21,732.18 and 8,674.12 is: 11,970.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,747.76 : 21,732.18 = 8,674.12 : x
  2. Step 2: Convert to fraction form
    15,747.76/21,732.18 = 8,674.12/x
  3. Step 3: Cross multiply
    15,747.76x = 21,732.18 × 8,674.12
  4. Step 4: Simplify right side
    15,747.76x = 188,507,537.18
  5. Step 5: Solve for x
    x = 188,507,537.18/15,747.76
  6. Step 6: Final answer
    x = 11,970.43

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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.