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Finding the Fourth Proportional to 19,662.80, 29,476.50 and 7,174.12

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Solution

The fourth proportional to 19,662.80, 29,476.50 and 7,174.12 is: 10,754.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,662.80 : 29,476.50 = 7,174.12 : x
  2. Step 2: Convert to fraction form
    19,662.80/29,476.50 = 7,174.12/x
  3. Step 3: Cross multiply
    19,662.80x = 29,476.50 × 7,174.12
  4. Step 4: Simplify right side
    19,662.80x = 211,467,948.18
  5. Step 5: Solve for x
    x = 211,467,948.18/19,662.80
  6. Step 6: Final answer
    x = 10,754.72

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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.