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Finding the Fourth Proportional to 32,879.80, 45,355.26 and 18,730

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Solution

The fourth proportional to 32,879.80, 45,355.26 and 18,730 is: 25,836.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    32,879.80 : 45,355.26 = 18,730 : x
  2. Step 2: Convert to fraction form
    32,879.80/45,355.26 = 18,730/x
  3. Step 3: Cross multiply
    32,879.80x = 45,355.26 × 18,730
  4. Step 4: Simplify right side
    32,879.80x = 849,504,019.80
  5. Step 5: Solve for x
    x = 849,504,019.80/32,879.80
  6. Step 6: Final answer
    x = 25,836.65

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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.