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Finding the Fourth Proportional to 19,608.57, 29,412.84 and 7,921.79

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Solution

The fourth proportional to 19,608.57, 29,412.84 and 7,921.79 is: 11,882.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,608.57 : 29,412.84 = 7,921.79 : x
  2. Step 2: Convert to fraction form
    19,608.57/29,412.84 = 7,921.79/x
  3. Step 3: Cross multiply
    19,608.57x = 29,412.84 × 7,921.79
  4. Step 4: Simplify right side
    19,608.57x = 233,002,194.72
  5. Step 5: Solve for x
    x = 233,002,194.72/19,608.57
  6. Step 6: Final answer
    x = 11,882.67

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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.