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Finding the Fourth Proportional to 19,879.47, 29,822.09 and 7,398.45

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Solution

The fourth proportional to 19,879.47, 29,822.09 and 7,398.45 is: 11,098.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,879.47 : 29,822.09 = 7,398.45 : x
  2. Step 2: Convert to fraction form
    19,879.47/29,822.09 = 7,398.45/x
  3. Step 3: Cross multiply
    19,879.47x = 29,822.09 × 7,398.45
  4. Step 4: Simplify right side
    19,879.47x = 220,637,204.77
  5. Step 5: Solve for x
    x = 220,637,204.77/19,879.47
  6. Step 6: Final answer
    x = 11,098.75

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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.