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Finding the Fourth Proportional to 19,871.01, 29,806.53 and 7,390.80

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Solution

The fourth proportional to 19,871.01, 29,806.53 and 7,390.80 is: 11,086.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,871.01 : 29,806.53 = 7,390.80 : x
  2. Step 2: Convert to fraction form
    19,871.01/29,806.53 = 7,390.80/x
  3. Step 3: Cross multiply
    19,871.01x = 29,806.53 × 7,390.80
  4. Step 4: Simplify right side
    19,871.01x = 220,294,101.92
  5. Step 5: Solve for x
    x = 220,294,101.92/19,871.01
  6. Step 6: Final answer
    x = 11,086.21

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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.