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Finding the Fourth Proportional to 15,748.40, 21,732.84 and 8,674.64

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Solution

The fourth proportional to 15,748.40, 21,732.84 and 8,674.64 is: 11,971.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,748.40 : 21,732.84 = 8,674.64 : x
  2. Step 2: Convert to fraction form
    15,748.40/21,732.84 = 8,674.64/x
  3. Step 3: Cross multiply
    15,748.40x = 21,732.84 × 8,674.64
  4. Step 4: Simplify right side
    15,748.40x = 188,524,563.18
  5. Step 5: Solve for x
    x = 188,524,563.18/15,748.40
  6. Step 6: Final answer
    x = 11,971.03

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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.