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Finding the Fourth Proportional to 19,905.34, 29,857.03 and 7,424.39

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Solution

The fourth proportional to 19,905.34, 29,857.03 and 7,424.39 is: 11,136.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,905.34 : 29,857.03 = 7,424.39 : x
  2. Step 2: Convert to fraction form
    19,905.34/29,857.03 = 7,424.39/x
  3. Step 3: Cross multiply
    19,905.34x = 29,857.03 × 7,424.39
  4. Step 4: Simplify right side
    19,905.34x = 221,670,234.96
  5. Step 5: Solve for x
    x = 221,670,234.96/19,905.34
  6. Step 6: Final answer
    x = 11,136.22

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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.