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Finding the Fourth Proportional to 19,558, 26,990.08 and 11,174.48

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Solution

The fourth proportional to 19,558, 26,990.08 and 11,174.48 is: 15,420.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,558 : 26,990.08 = 11,174.48 : x
  2. Step 2: Convert to fraction form
    19,558/26,990.08 = 11,174.48/x
  3. Step 3: Cross multiply
    19,558x = 26,990.08 × 11,174.48
  4. Step 4: Simplify right side
    19,558x = 301,600,109.16
  5. Step 5: Solve for x
    x = 301,600,109.16/19,558
  6. Step 6: Final answer
    x = 15,420.81

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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.