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Finding the Fourth Proportional to 32,978.93, 45,508.21 and 18,639.98

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Solution

The fourth proportional to 32,978.93, 45,508.21 and 18,639.98 is: 25,721.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    32,978.93 : 45,508.21 = 18,639.98 : x
  2. Step 2: Convert to fraction form
    32,978.93/45,508.21 = 18,639.98/x
  3. Step 3: Cross multiply
    32,978.93x = 45,508.21 × 18,639.98
  4. Step 4: Simplify right side
    32,978.93x = 848,272,020.75
  5. Step 5: Solve for x
    x = 848,272,020.75/32,978.93
  6. Step 6: Final answer
    x = 25,721.64

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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.